8139644568953 has 4 divisors (see below), whose sum is σ = 8312828496000. Its totient is φ = 7966460641908.

The previous prime is 8139644568911. The next prime is 8139644568983. The reversal of 8139644568953 is 3598654469318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8139644568953 - 2¹⁸ = 8139644306809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8139644568983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86591963453 + ... + 86591963546.

It is an arithmetic number, because the mean of its divisors is an integer number (2078207124000).

Almost surely, 2^{8139644568953} is an apocalyptic number.

It is an amenable number.

8139644568953 is a deficient number, since it is larger than the sum of its proper divisors (173183927047).

8139644568953 is a wasteful number, since it uses less digits than its factorization.

8139644568953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173183927046.

The product of its digits is 671846400, while the sum is 71.

The spelling of 8139644568953 in words is "eight trillion, one hundred thirty-nine billion, six hundred forty-four million, five hundred sixty-eight thousand, nine hundred fifty-three".