85375979520 has 416 divisors, whose sum is σ = 296684572800. Its totient is φ = 20837302272.

The previous prime is 85375979509. The next prime is 85375979527. The reversal of 85375979520 is 2597957358.

It is a tau number, because it is divible by the number of its divisors (416).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (85375979527) 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, 111021696 + ... + 111022464.

Almost surely, 2^85375979520 is an apocalyptic number.

85375979520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85375979520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148342286400).

85375979520 is an abundant number, since it is smaller than the sum of its proper divisors (211308593280).

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

85375979520 is a wasteful number, since it uses less digits than its factorization.

85375979520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 23814000, while the sum is 60.

The spelling of 85375979520 in words is "eighty-five billion, three hundred seventy-five million, nine hundred seventy-nine thousand, five hundred twenty".