7881831625 has 16 divisors (see below), whose sum is σ = 9877720320. Its totient is φ = 6279058800.

The previous prime is 7881831619. The next prime is 7881831631. The reversal of 7881831625 is 5261381887.

It is an interprime number because it is at equal distance from previous prime (7881831619) and next prime (7881831631).

It is a de Polignac number, because none of the positive numbers 2^k-7881831625 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102039 + ... + 161788.

It is an arithmetic number, because the mean of its divisors is an integer number (617357520).

Almost surely, 2^7881831625 is an apocalyptic number.

It is an amenable number.

7881831625 is a deficient number, since it is larger than the sum of its proper divisors (1995888695).

7881831625 is a wasteful number, since it uses less digits than its factorization.

7881831625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264081 (or 264071 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 7881831625 is about 88779.6802483541. The cubic root of 7881831625 is about 1990.1037482841.

The spelling of 7881831625 in words is "seven billion, eight hundred eighty-one million, eight hundred thirty-one thousand, six hundred twenty-five".