25679169020540 has 48 divisors (see below), whose sum is σ = 61899132388800. Its totient is φ = 8765839844352.

The previous prime is 25679169020507. The next prime is 25679169020581. The reversal of 25679169020540 is 4502096197652.

It is a super-2 number, since 2×25679169020540² (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 15 ways as a sum of consecutive naturals, for example, 400454045 + ... + 400518164.

It is an arithmetic number, because the mean of its divisors is an integer number (1289565258100).

Almost surely, 2^{25679169020540} is an apocalyptic number.

25679169020540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25679169020540 is an abundant number, since it is smaller than the sum of its proper divisors (36219963368260).

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

25679169020540 is a wasteful number, since it uses less digits than its factorization.

25679169020540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800972454 (or 800972452 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 25679169020540 in words is "twenty-five trillion, six hundred seventy-nine billion, one hundred sixty-nine million, twenty thousand, five hundred forty".