11240536545 has 72 divisors (see below), whose sum is σ = 23277317544. Its totient is φ = 4999615488.

The previous prime is 11240536537. The next prime is 11240536583. The reversal of 11240536545 is 54563504211.

11240536545 is a `hidden beast` number, since 11 + 240 + 5 + 365 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 647804304 + 10592732241 = 25452^2 + 102921^2 .

It is not a de Polignac number, because 11240536545 - 2³ = 11240536537 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12697 + ... + 150473.

It is an arithmetic number, because the mean of its divisors is an integer number (323296077).

Almost surely, 2^11240536545 is an apocalyptic number.

11240536545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11240536545 is an abundant number, since it is smaller than the sum of its proper divisors (12036780999).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11240536545 is a wasteful number, since it uses less digits than its factorization.

11240536545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137839 (or 137829 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 11240536545 in words is "eleven billion, two hundred forty million, five hundred thirty-six thousand, five hundred forty-five".