86157542491 has 4 divisors (see below), whose sum is σ = 86158262752. Its totient is φ = 86156822232.

The previous prime is 86157542389. The next prime is 86157542533. The reversal of 86157542491 is 19424575168.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 86157542491 - 2⁷ = 86157542363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86457542491) 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, 132915 + ... + 435868.

It is an arithmetic number, because the mean of its divisors is an integer number (21539565688).

Almost surely, 2^86157542491 is an apocalyptic number.

86157542491 is a deficient number, since it is larger than the sum of its proper divisors (720261).

86157542491 is a wasteful number, since it uses less digits than its factorization.

86157542491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720260.

The product of its digits is 2419200, while the sum is 52.

The spelling of 86157542491 in words is "eighty-six billion, one hundred fifty-seven million, five hundred forty-two thousand, four hundred ninety-one".