7861900957 has 12 divisors (see below), whose sum is σ = 8149298976. Its totient is φ = 7584323600.

The previous prime is 7861900951. The next prime is 7861900967. The reversal of 7861900957 is 7590091687.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7861900957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7861900951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1196832 + ... + 1203382.

It is an arithmetic number, because the mean of its divisors is an integer number (679108248).

Almost surely, 2^7861900957 is an apocalyptic number.

It is an amenable number.

7861900957 is a deficient number, since it is larger than the sum of its proper divisors (287398019).

7861900957 is a wasteful number, since it uses less digits than its factorization.

7861900957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036 (or 8007 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 7861900957 is about 88667.3612836200. The cubic root of 7861900957 is about 1988.4248840008.

The spelling of 7861900957 in words is "seven billion, eight hundred sixty-one million, nine hundred thousand, nine hundred fifty-seven".