11656605426 has 16 divisors (see below), whose sum is σ = 23323326528. Its totient is φ = 3883849200.

The previous prime is 11656605391. The next prime is 11656605449. The reversal of 11656605426 is 62450665611.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406465 + ... + 434196.

It is an arithmetic number, because the mean of its divisors is an integer number (1457707908).

Almost surely, 2^11656605426 is an apocalyptic number.

11656605426 is an abundant number, since it is smaller than the sum of its proper divisors (11666721102).

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

11656605426 is a wasteful number, since it uses less digits than its factorization.

11656605426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842977.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 11656605426 in words is "eleven billion, six hundred fifty-six million, six hundred five thousand, four hundred twenty-six".