85951771199 has 4 divisors (see below), whose sum is σ = 98230595664. Its totient is φ = 73672946736.

The previous prime is 85951771127. The next prime is 85951771223. The reversal of 85951771199 is 99117715958.

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 85951771199 - 2¹² = 85951767103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85951771099) 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, 6139412222 + ... + 6139412235.

It is an arithmetic number, because the mean of its divisors is an integer number (24557648916).

Almost surely, 2^85951771199 is an apocalyptic number.

85951771199 is a deficient number, since it is larger than the sum of its proper divisors (12278824465).

85951771199 is a wasteful number, since it uses less digits than its factorization.

85951771199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12278824464.

The product of its digits is 7144200, while the sum is 62.

The spelling of 85951771199 in words is "eighty-five billion, nine hundred fifty-one million, seven hundred seventy-one thousand, one hundred ninety-nine".