11311402545 has 20 divisors (see below), whose sum is σ = 20276737140. Its totient is φ = 6032747808.

The previous prime is 11311402519. The next prime is 11311402549. The reversal of 11311402545 is 54520411311.

11311402545 is a `hidden beast` number, since 1 + 1 + 3 + 114 + 0 + 2 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1522872576 + 9788529969 = 39024^2 + 98937^2 .

It is not a de Polignac number, because 11311402545 - 2⁹ = 11311402033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11311402549) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13964290 + ... + 13965099.

It is an arithmetic number, because the mean of its divisors is an integer number (1013836857).

Almost surely, 2^11311402545 is an apocalyptic number.

11311402545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11311402545 is a deficient number, since it is larger than the sum of its proper divisors (8965334595).

11311402545 is an equidigital number, since it uses as much as digits as its factorization.

11311402545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27929406 (or 27929397 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 11311402545 its reverse (54520411311), we get a palindrome (65831813856).

The spelling of 11311402545 in words is "eleven billion, three hundred eleven million, four hundred two thousand, five hundred forty-five".