25771888956420 has 72 divisors (see below), whose sum is σ = 78933707850816. Its totient is φ = 6805780379712.

The previous prime is 25771888956397. The next prime is 25771888956433. The reversal of 25771888956420 is 2465988817752.

25771888956420 is a `hidden beast` number, since 2 + 5 + 7 + 71 + 8 + 8 + 89 + 56 + 420 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 695016222 + ... + 695053301.

It is an arithmetic number, because the mean of its divisors is an integer number (1096301497928).

Almost surely, 2^{25771888956420} is an apocalyptic number.

25771888956420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25771888956420 is an abundant number, since it is smaller than the sum of its proper divisors (53161818894396).

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

25771888956420 is a wasteful number, since it uses less digits than its factorization.

25771888956420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390069641 (or 1390069636 counting only the distinct ones).

The product of its (nonzero) digits is 541900800, while the sum is 72.

The spelling of 25771888956420 in words is "twenty-five trillion, seven hundred seventy-one billion, eight hundred eighty-eight million, nine hundred fifty-six thousand, four hundred twenty".