7851575648 has 24 divisors (see below), whose sum is σ = 17666045712. Its totient is φ = 3364960896.

The previous prime is 7851575617. The next prime is 7851575657. The reversal of 7851575648 is 8465751587.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 7851575593 and 7851575602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17525615 + ... + 17526062.

It is an arithmetic number, because the mean of its divisors is an integer number (736085238).

Almost surely, 2^7851575648 is an apocalyptic number.

It is an amenable number.

7851575648 is an abundant number, since it is smaller than the sum of its proper divisors (9814470064).

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

7851575648 is a wasteful number, since it uses less digits than its factorization.

7851575648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35051694 (or 35051686 counting only the distinct ones).

The product of its digits is 9408000, while the sum is 56.

The square root of 7851575648 is about 88609.1171832786. The cubic root of 7851575648 is about 1987.5540133680.

The spelling of 7851575648 in words is "seven billion, eight hundred fifty-one million, five hundred seventy-five thousand, six hundred forty-eight".