10656519891 has 8 divisors (see below), whose sum is σ = 14213189520. Its totient is φ = 7102098432.

The previous prime is 10656519883. The next prime is 10656519893. The reversal of 10656519891 is 19891565601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10656519891 - 2³ = 10656519883 is a prime.

It is a super-2 number, since 2×10656519891² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10656519893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550950 + ... + 569963.

It is an arithmetic number, because the mean of its divisors is an integer number (1776648690).

Almost surely, 2^10656519891 is an apocalyptic number.

10656519891 is a deficient number, since it is larger than the sum of its proper divisors (3556669629).

10656519891 is a wasteful number, since it uses less digits than its factorization.

10656519891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124085.

The product of its (nonzero) digits is 583200, while the sum is 51.

The spelling of 10656519891 in words is "ten billion, six hundred fifty-six million, five hundred nineteen thousand, eight hundred ninety-one".