25171189121408 has 64 divisors (see below), whose sum is σ = 55215687597120. Its totient is φ = 11334520097280.

The previous prime is 25171189121381. The next prime is 25171189121411. The reversal of 25171189121408 is 80412198117152.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83387966 + ... + 83689277.

It is an arithmetic number, because the mean of its divisors is an integer number (862745118705).

Almost surely, 2^{25171189121408} is an apocalyptic number.

It is an amenable number.

25171189121408 is an abundant number, since it is smaller than the sum of its proper divisors (30044498475712).

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

25171189121408 is a wasteful number, since it uses less digits than its factorization.

25171189121408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167077375 (or 167077363 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 50.

The spelling of 25171189121408 in words is "twenty-five trillion, one hundred seventy-one billion, one hundred eighty-nine million, one hundred twenty-one thousand, four hundred eight".