86869999957479 has 4 divisors (see below), whose sum is σ = 115826666609976. Its totient is φ = 57913333304984.

The previous prime is 86869999957459. The next prime is 86869999957501. The reversal of 86869999957479 is 97475999996868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86869999957479 - 2²⁴ = 86869983180263 is a prime.

It is a super-2 number, since 2×86869999957479² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86869999957439) 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, 14478333326244 + ... + 14478333326249.

It is an arithmetic number, because the mean of its divisors is an integer number (28956666652494).

Almost surely, 2^{86869999957479} is an apocalyptic number.

86869999957479 is a deficient number, since it is larger than the sum of its proper divisors (28956666652497).

86869999957479 is a wasteful number, since it uses less digits than its factorization.

86869999957479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28956666652496.

The product of its digits is 1199951262720, while the sum is 105.

The spelling of 86869999957479 in words is "eighty-six trillion, eight hundred sixty-nine billion, nine hundred ninety-nine million, nine hundred fifty-seven thousand, four hundred seventy-nine".