9719992856 has 16 divisors (see below), whose sum is σ = 20828556240. Its totient is φ = 4165711200.

The previous prime is 9719992847. The next prime is 9719992903. The reversal of 9719992856 is 6582999179.

It is a super-2 number, since 2×9719992856² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9719992792 and 9719992801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86785595 + ... + 86785706.

It is an arithmetic number, because the mean of its divisors is an integer number (1301784765).

Almost surely, 2^9719992856 is an apocalyptic number.

It is an amenable number.

9719992856 is an abundant number, since it is smaller than the sum of its proper divisors (11108563384).

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

9719992856 is a wasteful number, since it uses less digits than its factorization.

9719992856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173571314 (or 173571310 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 65.

The square root of 9719992856 is about 98590.0241200904. The cubic root of 9719992856 is about 2134.1354598452.

The spelling of 9719992856 in words is "nine billion, seven hundred nineteen million, nine hundred ninety-two thousand, eight hundred fifty-six".