25065630657 has 16 divisors (see below), whose sum is σ = 37320880000. Its totient is φ = 16626444912.

The previous prime is 25065630587. The next prime is 25065630721. The reversal of 25065630657 is 75603656052.

25065630657 is a `hidden beast` number, since 2 + 5 + 0 + 6 + 5 + 630 + 6 + 5 + 7 = 666.

It is not a de Polignac number, because 25065630657 - 2¹² = 25065626561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25065630157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2327182 + ... + 2337927.

It is an arithmetic number, because the mean of its divisors is an integer number (2332555000).

Almost surely, 2^25065630657 is an apocalyptic number.

25065630657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25065630657 is a deficient number, since it is larger than the sum of its proper divisors (12255249343).

25065630657 is a wasteful number, since it uses less digits than its factorization.

25065630657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665317 (or 4665311 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

The spelling of 25065630657 in words is "twenty-five billion, sixty-five million, six hundred thirty thousand, six hundred fifty-seven".