7881287632 has 10 divisors (see below), whose sum is σ = 15269994818. Its totient is φ = 3940643808.

The previous prime is 7881287627. The next prime is 7881287707. The reversal of 7881287632 is 2367821887.

It can be written as a sum of positive squares in only one way, i.e., 4297589136 + 3583698496 = 65556^2 + 59864^2 .

It is a super-2 number, since 2×7881287632² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7881287632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246290223 + ... + 246290254.

Almost surely, 2^7881287632 is an apocalyptic number.

It is an amenable number.

7881287632 is a deficient number, since it is larger than the sum of its proper divisors (7388707186).

7881287632 is a wasteful number, since it uses less digits than its factorization.

7881287632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492580485 (or 492580479 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The square root of 7881287632 is about 88776.6164707802. The cubic root of 7881287632 is about 1990.0579625045.

The spelling of 7881287632 in words is "seven billion, eight hundred eighty-one million, two hundred eighty-seven thousand, six hundred thirty-two".