85611911751 has 12 divisors (see below), whose sum is σ = 124131850128. Its totient is φ = 56857592544.

The previous prime is 85611911699. The next prime is 85611911771. The reversal of 85611911751 is 15711911658.

85611911751 is a `hidden beast` number, since 8 + 561 + 1 + 9 + 11 + 75 + 1 = 666.

It is not a de Polignac number, because 85611911751 - 2¹⁵ = 85611878983 is a prime.

It is a super-2 number, since 2×85611911751² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85611911697 and 85611911706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85611911771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18082110 + ... + 18086843.

It is an arithmetic number, because the mean of its divisors is an integer number (10344320844).

Almost surely, 2^85611911751 is an apocalyptic number.

85611911751 is a deficient number, since it is larger than the sum of its proper divisors (38519938377).

85611911751 is a wasteful number, since it uses less digits than its factorization.

85611911751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36169222 (or 36169219 counting only the distinct ones).

The product of its digits is 75600, while the sum is 45.

The spelling of 85611911751 in words is "eighty-five billion, six hundred eleven million, nine hundred eleven thousand, seven hundred fifty-one".