85724420939979 has 16 divisors (see below), whose sum is σ = 116536997771040. Its totient is φ = 56041539517440.

The previous prime is 85724420939957. The next prime is 85724420940031. The reversal of 85724420939979 is 97993902442758.

85724420939979 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 85724420939979 - 2¹¹ = 85724420937931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85724420934979) 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, 1351278552 + ... + 1351341989.

It is an arithmetic number, because the mean of its divisors is an integer number (7283562360690).

Almost surely, 2^{85724420939979} is an apocalyptic number.

85724420939979 is a deficient number, since it is larger than the sum of its proper divisors (30812576831061).

85724420939979 is a wasteful number, since it uses less digits than its factorization.

85724420939979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702620750.

The product of its (nonzero) digits is 2469035520, while the sum is 78.

The spelling of 85724420939979 in words is "eighty-five trillion, seven hundred twenty-four billion, four hundred twenty million, nine hundred thirty-nine thousand, nine hundred seventy-nine".