21160100656 has 40 divisors (see below), whose sum is σ = 42686205408. Its totient is φ = 10152768000.

The previous prime is 21160100653. The next prime is 21160100659. The reversal of 21160100656 is 65600106112.

It is an interprime number because it is at equal distance from previous prime (21160100653) and next prime (21160100659).

It is not an unprimeable number, because it can be changed into a prime (21160100653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224380 + ... + 304411.

Almost surely, 2^21160100656 is an apocalyptic number.

It is an amenable number.

21160100656 is an abundant number, since it is smaller than the sum of its proper divisors (21526104752).

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

21160100656 is a wasteful number, since it uses less digits than its factorization.

21160100656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528901 (or 528895 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 21160100656 its reverse (65600106112), we get a palindrome (86760206768).

The spelling of 21160100656 in words is "twenty-one billion, one hundred sixty million, one hundred thousand, six hundred fifty-six".