8156513880 has 48 divisors (see below), whose sum is σ = 26508671280. Its totient is φ = 2175070272.

The previous prime is 8156513873. The next prime is 8156513887. The reversal of 8156513880 is 883156518.

8156513880 is a `hidden beast` number, since 8 + 1 + 56 + 513 + 8 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (8156513873) and next prime (8156513887).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8156513887) 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, 11328132 + ... + 11328851.

It is an arithmetic number, because the mean of its divisors is an integer number (552263985).

Almost surely, 2^8156513880 is an apocalyptic number.

It is an amenable number.

8156513880 is an abundant number, since it is smaller than the sum of its proper divisors (18352157400).

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

8156513880 is a wasteful number, since it uses less digits than its factorization.

8156513880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22657000 (or 22656993 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 8156513880 is about 90313.4202652075. The cubic root of 8156513880 is about 2012.9586783184.

The spelling of 8156513880 in words is "eight billion, one hundred fifty-six million, five hundred thirteen thousand, eight hundred eighty".