25479761656320 has 280 divisors, whose sum is σ = 91595670348996. Its totient is φ = 6794602610688.

The previous prime is 25479761656309. The next prime is 25479761656369. The reversal of 25479761656320 is 2365616797452.

25479761656320 is a `hidden beast` number, since 2 + 5 + 4 + 7 + 9 + 7 + 61 + 6 + 563 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23825801044224 + 1653960612096 = 4881168^2 + 1286064^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4960257 + ... + 8692736.

Almost surely, 2^{25479761656320} is an apocalyptic number.

25479761656320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25479761656320 is an abundant number, since it is smaller than the sum of its proper divisors (66115908692676).

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

25479761656320 is an frugal number, since it uses more digits than its factorization.

25479761656320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13653034 (or 13653003 counting only the distinct ones).

The product of its (nonzero) digits is 114307200, while the sum is 63.

The spelling of 25479761656320 in words is "twenty-five trillion, four hundred seventy-nine billion, seven hundred sixty-one million, six hundred fifty-six thousand, three hundred twenty".