25717926261540 has 24 divisors (see below), whose sum is σ = 72010193532480. Its totient is φ = 6858113669728.

The previous prime is 25717926261509. The next prime is 25717926261551. The reversal of 25717926261540 is 4516262971752.

It is a happy number.

It is a super-2 number, since 2×25717926261540² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

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, 214316052120 + ... + 214316052239.

It is an arithmetic number, because the mean of its divisors is an integer number (3000424730520).

Almost surely, 2^{25717926261540} is an apocalyptic number.

25717926261540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25717926261540 is an abundant number, since it is smaller than the sum of its proper divisors (46292267270940).

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

25717926261540 is a wasteful number, since it uses less digits than its factorization.

25717926261540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428632104371 (or 428632104369 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 25717926261540 in words is "twenty-five trillion, seven hundred seventeen billion, nine hundred twenty-six million, two hundred sixty-one thousand, five hundred forty".