25139351791892 has 24 divisors (see below), whose sum is σ = 47381300468712. Its totient is φ = 11601971712000.

The previous prime is 25139351791871. The next prime is 25139351791901. The reversal of 25139351791892 is 29819715393152.

It can be written as a sum of positive squares in 4 ways, for example, as 9857866796176 + 15281484995716 = 3139724^2 + 3909154^2 .

It is a super-2 number, since 2×25139351791892² (a number of 28 digits) contains 22 as substring.

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, 16036409 + ... + 17534112.

It is an arithmetic number, because the mean of its divisors is an integer number (1974220852863).

Almost surely, 2^{25139351791892} is an apocalyptic number.

It is an amenable number.

25139351791892 is a deficient number, since it is larger than the sum of its proper divisors (22241948676820).

25139351791892 is a wasteful number, since it uses less digits than its factorization.

25139351791892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33584939 (or 33584937 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 65.

The spelling of 25139351791892 in words is "twenty-five trillion, one hundred thirty-nine billion, three hundred fifty-one million, seven hundred ninety-one thousand, eight hundred ninety-two".