860053139491 has 32 divisors (see below), whose sum is σ = 1096705949696. Its totient is φ = 656100000000.

The previous prime is 860053139483. The next prime is 860053139497. The reversal of 860053139491 is 194931350068.

It is a 8-Lehmer number, since φ(860053139491) divides (860053139491-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 860053139491 - 2³ = 860053139483 is a prime.

It is the 927391-st Hogben number.

It is not an unprimeable number, because it can be changed into a prime (860053139497) by changing a digit.

It is a nontrivial repunit in base 927390.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201991 + ... + 1326991.

It is an arithmetic number, because the mean of its divisors is an integer number (34272060928).

Almost surely, 2^860053139491 is an apocalyptic number.

860053139491 is a deficient number, since it is larger than the sum of its proper divisors (236652810205).

860053139491 is a wasteful number, since it uses less digits than its factorization.

860053139491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125323.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 860053139491 in words is "eight hundred sixty billion, fifty-three million, one hundred thirty-nine thousand, four hundred ninety-one".