16256203656 has 64 divisors (see below), whose sum is σ = 50668692480. Its totient is φ = 4222390080.

The previous prime is 16256203637. The next prime is 16256203669. The reversal of 16256203656 is 65630265261.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4396476 + ... + 4400171.

It is an arithmetic number, because the mean of its divisors is an integer number (791698320).

Almost surely, 2^16256203656 is an apocalyptic number.

It is an amenable number.

16256203656 is an abundant number, since it is smaller than the sum of its proper divisors (34412488824).

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

16256203656 is a wasteful number, since it uses less digits than its factorization.

16256203656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796674 (or 8796670 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

It can be divided in two parts, 16256 and 203656, that added together give a palindrome (219912).

The spelling of 16256203656 in words is "sixteen billion, two hundred fifty-six million, two hundred three thousand, six hundred fifty-six".