85521885534 has 16 divisors (see below), whose sum is σ = 190048634640. Its totient is φ = 28507295160.

The previous prime is 85521885521. The next prime is 85521885539. The reversal of 85521885534 is 43558812558.

85521885534 is a `hidden beast` number, since 8 + 5 + 5 + 2 + 1 + 88 + 553 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1583738621 = 85521885534 / (8 + 5 + 5 + 2 + 1 + 8 + 8 + 5 + 5 + 3 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85521885539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791869257 + ... + 791869364.

It is an arithmetic number, because the mean of its divisors is an integer number (11878039665).

Almost surely, 2^85521885534 is an apocalyptic number.

85521885534 is an abundant number, since it is smaller than the sum of its proper divisors (104526749106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85521885534 is a wasteful number, since it uses less digits than its factorization.

85521885534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583738632 (or 1583738626 counting only the distinct ones).

The product of its digits is 7680000, while the sum is 54.

The spelling of 85521885534 in words is "eighty-five billion, five hundred twenty-one million, eight hundred eighty-five thousand, five hundred thirty-four".