25665562560 has 112 divisors (see below), whose sum is σ = 88896212352. Its totient is φ = 6221952000.

The previous prime is 25665562511. The next prime is 25665562579. The reversal of 25665562560 is 6526556652.

It is a super-2 number, since 2×25665562560² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204666 + ... + 1225785.

Almost surely, 2^25665562560 is an apocalyptic number.

25665562560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25665562560 is an abundant number, since it is smaller than the sum of its proper divisors (63230649792).

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

25665562560 is a wasteful number, since it uses less digits than its factorization.

25665562560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430482 (or 2430472 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 25665562560 in words is "twenty-five billion, six hundred sixty-five million, five hundred sixty-two thousand, five hundred sixty".