8138323672 has 16 divisors (see below), whose sum is σ = 15268876560. Its totient is φ = 4066623264.

The previous prime is 8138323643. The next prime is 8138323709. The reversal of 8138323672 is 2763238318.

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, 303663 + ... + 329374.

It is an arithmetic number, because the mean of its divisors is an integer number (954304785).

Almost surely, 2^8138323672 is an apocalyptic number.

It is an amenable number.

8138323672 is a deficient number, since it is larger than the sum of its proper divisors (7130552888).

8138323672 is a wasteful number, since it uses less digits than its factorization.

8138323672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634650 (or 634646 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 8138323672 is about 90212.6580475268. The cubic root of 8138323672 is about 2011.4611680204.

The spelling of 8138323672 in words is "eight billion, one hundred thirty-eight million, three hundred twenty-three thousand, six hundred seventy-two".