9787999956 has 48 divisors (see below), whose sum is σ = 26247191040. Its totient is φ = 2780943840.

The previous prime is 9787999937. The next prime is 9787999957. The reversal of 9787999956 is 6599997879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9787999957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310450 + ... + 340521.

It is an arithmetic number, because the mean of its divisors is an integer number (546816480).

Almost surely, 2^9787999956 is an apocalyptic number.

It is an amenable number.

9787999956 is an abundant number, since it is smaller than the sum of its proper divisors (16459191084).

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

9787999956 is a wasteful number, since it uses less digits than its factorization.

9787999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651164 (or 651162 counting only the distinct ones).

The product of its digits is 694416240, while the sum is 78.

The square root of 9787999956 is about 98934.3214258833. The cubic root of 9787999956 is about 2139.1011420004.

The spelling of 9787999956 in words is "nine billion, seven hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred fifty-six".