85724420939980 has 48 divisors (see below), whose sum is σ = 189509425428960. Its totient is φ = 32482757376000.

The previous prime is 85724420939957. The next prime is 85724420940031. The reversal of 85724420939980 is 8993902442758.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2527621 + ... + 13335580.

It is an arithmetic number, because the mean of its divisors is an integer number (3948113029770).

Almost surely, 2^{85724420939980} is an apocalyptic number.

It is an amenable number.

85724420939980 is an abundant number, since it is smaller than the sum of its proper divisors (103785004488980).

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

85724420939980 is a wasteful number, since it uses less digits than its factorization.

85724420939980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15877450 (or 15877448 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 85724420939980 in words is "eighty-five trillion, seven hundred twenty-four billion, four hundred twenty million, nine hundred thirty-nine thousand, nine hundred eighty".