7985478556 has 12 divisors (see below), whose sum is σ = 15245004600. Its totient is φ = 3629762960.

The previous prime is 7985478551. The next prime is 7985478563. The reversal of 7985478556 is 6558745897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7985478551) 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, 90744031 + ... + 90744118.

It is an arithmetic number, because the mean of its divisors is an integer number (1270417050).

Almost surely, 2^7985478556 is an apocalyptic number.

It is an amenable number.

7985478556 is a deficient number, since it is larger than the sum of its proper divisors (7259526044).

7985478556 is a wasteful number, since it uses less digits than its factorization.

7985478556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181488164 (or 181488162 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 64.

The square root of 7985478556 is about 89361.5048888502. The cubic root of 7985478556 is about 1998.7891467318.

The spelling of 7985478556 in words is "seven billion, nine hundred eighty-five million, four hundred seventy-eight thousand, five hundred fifty-six".