7915523940 has 36 divisors (see below), whose sum is σ = 24010423164. Its totient is φ = 2110806336.

The previous prime is 7915523927. The next prime is 7915523951. The reversal of 7915523940 is 493255197.

It is a happy number.

7915523940 is a `hidden beast` number, since 7 + 9 + 1 + 552 + 3 + 94 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5121978624 + 2793545316 = 71568^2 + 52854^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21987387 + ... + 21987746.

It is an arithmetic number, because the mean of its divisors is an integer number (666956199).

Almost surely, 2^7915523940 is an apocalyptic number.

It is an amenable number.

7915523940 is an abundant number, since it is smaller than the sum of its proper divisors (16094899224).

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

7915523940 is a wasteful number, since it uses less digits than its factorization.

7915523940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43975148 (or 43975143 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 7915523940 is about 88969.2302990197. The cubic root of 7915523940 is about 1992.9354034531.

The spelling of 7915523940 in words is "seven billion, nine hundred fifteen million, five hundred twenty-three thousand, nine hundred forty".