25255000557 has 16 divisors (see below), whose sum is σ = 37417636480. Its totient is φ = 16835397696.

The previous prime is 25255000553. The next prime is 25255000591. The reversal of 25255000557 is 75500055252.

25255000557 is a `hidden beast` number, since 2 + 52 + 5 + 50 + 0 + 0 + 557 = 666.

It is not a de Polignac number, because 25255000557 - 2² = 25255000553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255000553) 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, 451848 + ... + 504654.

It is an arithmetic number, because the mean of its divisors is an integer number (2338602280).

Almost surely, 2^25255000557 is an apocalyptic number.

25255000557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25255000557 is a deficient number, since it is larger than the sum of its proper divisors (12162635923).

25255000557 is a wasteful number, since it uses less digits than its factorization.

25255000557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70529 (or 70523 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The spelling of 25255000557 in words is "twenty-five billion, two hundred fifty-five million, five hundred fifty-seven", and thus it is an aban number.