7911985156 has 12 divisors (see below), whose sum is σ = 13846814800. Its totient is φ = 3955752360.

The previous prime is 7911985153. The next prime is 7911985201. The reversal of 7911985156 is 6515891197.

It is not an unprimeable number, because it can be changed into a prime (7911985153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28591 + ... + 129001.

Almost surely, 2^7911985156 is an apocalyptic number.

It is an amenable number.

7911985156 is a deficient number, since it is larger than the sum of its proper divisors (5934829644).

7911985156 is a wasteful number, since it uses less digits than its factorization.

7911985156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120114 (or 120112 counting only the distinct ones).

The product of its digits is 680400, while the sum is 52.

The square root of 7911985156 is about 88949.3403910338. The cubic root of 7911985156 is about 1992.6383660859.

The spelling of 7911985156 in words is "seven billion, nine hundred eleven million, nine hundred eighty-five thousand, one hundred fifty-six".