85143017520 has 120 divisors (see below), whose sum is σ = 311933084112. Its totient is φ = 20640729600.

The previous prime is 85143017513. The next prime is 85143017579. The reversal of 85143017520 is 2571034158.

85143017520 is a `hidden beast` number, since 8 + 51 + 430 + 175 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×85143017520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5367271 + ... + 5383110.

Almost surely, 2^85143017520 is an apocalyptic number.

85143017520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85143017520 is an abundant number, since it is smaller than the sum of its proper divisors (226790066592).

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

85143017520 is a wasteful number, since it uses less digits than its factorization.

85143017520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750411 (or 10750402 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 85143017520 in words is "eighty-five billion, one hundred forty-three million, seventeen thousand, five hundred twenty".