85506712135 has 32 divisors (see below), whose sum is σ = 114384291840. Its totient is φ = 60927164928.

The previous prime is 85506712063. The next prime is 85506712139. The reversal of 85506712135 is 53121760558.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85506712135 - 2¹³ = 85506703943 is a prime.

It is a super-2 number, since 2×85506712135² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85506712091 and 85506712100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85506712139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3121117 + ... + 3148393.

It is an arithmetic number, because the mean of its divisors is an integer number (3574509120).

Almost surely, 2^85506712135 is an apocalyptic number.

85506712135 is a deficient number, since it is larger than the sum of its proper divisors (28877579705).

85506712135 is a wasteful number, since it uses less digits than its factorization.

85506712135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28987.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 85506712135 in words is "eighty-five billion, five hundred six million, seven hundred twelve thousand, one hundred thirty-five".