25525507557 has 16 divisors (see below), whose sum is σ = 37247408640. Its totient is φ = 15420255600.

The previous prime is 25525507543. The next prime is 25525507639. The reversal of 25525507557 is 75570552552.

It is not a de Polignac number, because 25525507557 - 2⁶ = 25525507493 is a prime.

It is a super-3 number, since 3×25525507557³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525507517) by changing a digit.

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, 1233307 + ... + 1253832.

It is an arithmetic number, because the mean of its divisors is an integer number (2327963040).

Almost surely, 2^25525507557 is an apocalyptic number.

It is an amenable number.

25525507557 is a deficient number, since it is larger than the sum of its proper divisors (11721901083).

25525507557 is a wasteful number, since it uses less digits than its factorization.

25525507557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487464.

The product of its (nonzero) digits is 3062500, while the sum is 48.

The spelling of 25525507557 in words is "twenty-five billion, five hundred twenty-five million, five hundred seven thousand, five hundred fifty-seven".