11317854645 has 18 divisors (see below), whose sum is σ = 19618851798. Its totient is φ = 6035808528.

The previous prime is 11317854641. The next prime is 11317854649. The reversal of 11317854645 is 54645871311.

11317854645 is a `hidden beast` number, since 1 + 1 + 31 + 78 + 546 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (11317854641) and next prime (11317854649).

It can be written as a sum of positive squares in only one way, i.e., 9054283716 + 2263570929 = 95154^2 + 47577^2 .

It is not a de Polignac number, because 11317854645 - 2² = 11317854641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11317854645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11317854641) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 705726 + ... + 721584.

It is an arithmetic number, because the mean of its divisors is an integer number (1089936211).

Almost surely, 2^11317854645 is an apocalyptic number.

11317854645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11317854645 is a deficient number, since it is larger than the sum of its proper divisors (8300997153).

11317854645 is an frugal number, since it uses more digits than its factorization.

11317854645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31729 (or 15867 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

Multiplying 11317854645 by its sum of digits (45), we get a square (509303459025 = 713655²).

11317854645 divided by its sum of digits (45) gives a square (251507881 = 15859²).

The spelling of 11317854645 in words is "eleven billion, three hundred seventeen million, eight hundred fifty-four thousand, six hundred forty-five".