7855897008872 has 32 divisors (see below), whose sum is σ = 16069373369280. Its totient is φ = 3570752693760.

The previous prime is 7855897008857. The next prime is 7855897008889. The reversal of 7855897008872 is 2788007985587.

It is a self number, because there is not a number n which added to its sum of digits gives 7855897008872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549208 + ... + 4255800.

It is an arithmetic number, because the mean of its divisors is an integer number (502167917790).

Almost surely, 2^{7855897008872} is an apocalyptic number.

It is an amenable number.

7855897008872 is an abundant number, since it is smaller than the sum of its proper divisors (8213476360408).

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

7855897008872 is a wasteful number, since it uses less digits than its factorization.

7855897008872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739593 (or 2739589 counting only the distinct ones).

The product of its (nonzero) digits is 632217600, while the sum is 74.

The spelling of 7855897008872 in words is "seven trillion, eight hundred fifty-five billion, eight hundred ninety-seven million, eight thousand, eight hundred seventy-two".