85520754531 has 16 divisors (see below), whose sum is σ = 127110121600. Its totient is φ = 56828118024.

The previous prime is 85520754509. The next prime is 85520754559. The reversal of 85520754531 is 13545702558.

85520754531 is a `hidden beast` number, since 8 + 5 + 520 + 75 + 4 + 53 + 1 = 666.

It is not a de Polignac number, because 85520754531 - 2²⁹ = 84983883619 is a prime.

It is a super-2 number, since 2×85520754531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85520754131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5150401 + ... + 5166978.

It is an arithmetic number, because the mean of its divisors is an integer number (7944382600).

Almost surely, 2^85520754531 is an apocalyptic number.

85520754531 is a deficient number, since it is larger than the sum of its proper divisors (41589367069).

85520754531 is a wasteful number, since it uses less digits than its factorization.

85520754531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317695 (or 10317689 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 85520754531 in words is "eighty-five billion, five hundred twenty million, seven hundred fifty-four thousand, five hundred thirty-one".