7995131640 has 96 divisors (see below), whose sum is σ = 25999580880. Its totient is φ = 2130771456.

The previous prime is 7995131633. The next prime is 7995131653. The reversal of 7995131640 is 461315997.

7995131640 is a `hidden beast` number, since 7 + 99 + 513 + 1 + 6 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 709732 + ... + 720908.

Almost surely, 2^7995131640 is an apocalyptic number.

It is a pronic number, being equal to 89415×89416.

It is an amenable number.

7995131640 is an abundant number, since it is smaller than the sum of its proper divisors (18004449240).

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

7995131640 is a wasteful number, since it uses less digits than its factorization.

7995131640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13181 (or 13174 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 7995131640 is about 89415.4999986020. The cubic root of 7995131640 is about 1999.5942210106.

The spelling of 7995131640 in words is "seven billion, nine hundred ninety-five million, one hundred thirty-one thousand, six hundred forty".