25555852972 has 24 divisors (see below), whose sum is σ = 48178304496. Its totient is φ = 11791249728.

The previous prime is 25555852937. The next prime is 25555852979. The reversal of 25555852972 is 27925855552.

It is a happy number.

It is a super-2 number, since 2×25555852972² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25555852979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89838 + ... + 243274.

It is an arithmetic number, because the mean of its divisors is an integer number (2007429354).

Almost surely, 2^25555852972 is an apocalyptic number.

It is an amenable number.

25555852972 is a deficient number, since it is larger than the sum of its proper divisors (22622451524).

25555852972 is a wasteful number, since it uses less digits than its factorization.

25555852972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156657 (or 156655 counting only the distinct ones).

The product of its digits is 12600000, while the sum is 55.

The spelling of 25555852972 in words is "twenty-five billion, five hundred fifty-five million, eight hundred fifty-two thousand, nine hundred seventy-two".