85669632579 has 4 divisors (see below), whose sum is σ = 114226176776. Its totient is φ = 57113088384.

The previous prime is 85669632563. The next prime is 85669632661. The reversal of 85669632579 is 97523696658.

It is a happy number.

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

It is not a de Polignac number, because 85669632579 - 2⁴ = 85669632563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85669632379) 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, 14278272094 + ... + 14278272099.

It is an arithmetic number, because the mean of its divisors is an integer number (28556544194).

Almost surely, 2^85669632579 is an apocalyptic number.

85669632579 is a deficient number, since it is larger than the sum of its proper divisors (28556544197).

85669632579 is a wasteful number, since it uses less digits than its factorization.

85669632579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28556544196.

The product of its digits is 146966400, while the sum is 66.

The spelling of 85669632579 in words is "eighty-five billion, six hundred sixty-nine million, six hundred thirty-two thousand, five hundred seventy-nine".