25381086957 has 24 divisors (see below), whose sum is σ = 37072069944. Its totient is φ = 16731961344.

The previous prime is 25381086943. The next prime is 25381086959. The reversal of 25381086957 is 75968018352.

25381086957 is a `hidden beast` number, since 2 + 538 + 10 + 8 + 6 + 95 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 288626121 + 25092460836 = 16989^2 + 158406^2 .

It is not a de Polignac number, because 25381086957 - 2⁸ = 25381086701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25381086959) 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, 411543 + ... + 469179.

It is an arithmetic number, because the mean of its divisors is an integer number (1544669581).

Almost surely, 2^25381086957 is an apocalyptic number.

It is an amenable number.

25381086957 is a deficient number, since it is larger than the sum of its proper divisors (11690982987).

25381086957 is a wasteful number, since it uses less digits than its factorization.

25381086957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58189 (or 58186 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 25381086957 in words is "twenty-five billion, three hundred eighty-one million, eighty-six thousand, nine hundred fifty-seven".