25512557975 has 6 divisors (see below), whose sum is σ = 31635571920. Its totient is φ = 20410046360.

The previous prime is 25512557923. The next prime is 25512557977. The reversal of 25512557975 is 57975521552.

It is a happy number.

It is not a de Polignac number, because 25512557975 - 2¹⁴ = 25512541591 is a prime.

It is a super-2 number, since 2×25512557975² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25512557977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510251135 + ... + 510251184.

It is an arithmetic number, because the mean of its divisors is an integer number (5272595320).

Almost surely, 2^25512557975 is an apocalyptic number.

25512557975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25512557975 is a deficient number, since it is larger than the sum of its proper divisors (6123013945).

25512557975 is a wasteful number, since it uses less digits than its factorization.

25512557975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020502329 (or 1020502324 counting only the distinct ones).

The product of its digits is 5512500, while the sum is 53.

The spelling of 25512557975 in words is "twenty-five billion, five hundred twelve million, five hundred fifty-seven thousand, nine hundred seventy-five".