25520715020979 has 24 divisors (see below), whose sum is σ = 37488548151600. Its totient is φ = 16725220761600.

The previous prime is 25520715020959. The next prime is 25520715020987. The reversal of 25520715020979 is 97902051702552.

25520715020979 is a `hidden beast` number, since 2 + 5 + 520 + 7 + 1 + 5 + 0 + 20 + 97 + 9 = 666.

It is not a de Polignac number, because 25520715020979 - 2¹⁷ = 25520714889907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25520715020959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46780179 + ... + 47322579.

It is an arithmetic number, because the mean of its divisors is an integer number (1562022839650).

Almost surely, 2^{25520715020979} is an apocalyptic number.

25520715020979 is a deficient number, since it is larger than the sum of its proper divisors (11967833130621).

25520715020979 is a wasteful number, since it uses less digits than its factorization.

25520715020979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631075 (or 631072 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

The spelling of 25520715020979 in words is "twenty-five trillion, five hundred twenty billion, seven hundred fifteen million, twenty thousand, nine hundred seventy-nine".