11561320926 has 48 divisors (see below), whose sum is σ = 25508422368. Its totient is φ = 3783628800.

The previous prime is 11561320919. The next prime is 11561320933. The reversal of 11561320926 is 62902316511.

11561320926 is a `hidden beast` number, since 1 + 1 + 561 + 3 + 2 + 0 + 92 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (11561320919) and next prime (11561320933).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289230 + ... + 326766.

It is an arithmetic number, because the mean of its divisors is an integer number (531425466).

Almost surely, 2^11561320926 is an apocalyptic number.

11561320926 is an abundant number, since it is smaller than the sum of its proper divisors (13947101442).

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

11561320926 is a wasteful number, since it uses less digits than its factorization.

11561320926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37857 (or 37854 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 11561320926 in words is "eleven billion, five hundred sixty-one million, three hundred twenty thousand, nine hundred twenty-six".