8139475764 has 216 divisors, whose sum is σ = 25337294528. Its totient is φ = 2157373440.

The previous prime is 8139475741. The next prime is 8139475777. The reversal of 8139475764 is 4675749318.

8139475764 is a `hidden beast` number, since 81 + 39 + 475 + 7 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 8139475764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5315679 + ... + 5317209.

Almost surely, 2^8139475764 is an apocalyptic number.

8139475764 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8139475764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12668647264).

8139475764 is an abundant number, since it is smaller than the sum of its proper divisors (17197818764).

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

8139475764 is a wasteful number, since it uses less digits than its factorization.

8139475764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1633 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 8139475764 is about 90219.0432447607. The cubic root of 8139475764 is about 2011.5560802353.

The spelling of 8139475764 in words is "eight billion, one hundred thirty-nine million, four hundred seventy-five thousand, seven hundred sixty-four".