85591207980 has 240 divisors, whose sum is σ = 299261904480. Its totient is φ = 20350973952.

The previous prime is 85591207931. The next prime is 85591207993. The reversal of 85591207980 is 8970219558.

85591207980 is a `hidden beast` number, since 8 + 559 + 1 + 2 + 0 + 7 + 9 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 441474 + ... + 605046.

It is an arithmetic number, because the mean of its divisors is an integer number (1246924602).

Almost surely, 2^85591207980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85591207980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149630952240).

85591207980 is an abundant number, since it is smaller than the sum of its proper divisors (213670696500).

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

85591207980 is a wasteful number, since it uses less digits than its factorization.

85591207980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163630 (or 163619 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The spelling of 85591207980 in words is "eighty-five billion, five hundred ninety-one million, two hundred seven thousand, nine hundred eighty".