25630557 has 8 divisors (see below), whose sum is σ = 34901376. Its totient is φ = 16723392.

The previous prime is 25630513. The next prime is 25630559. The reversal of 25630557 is 75503652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25630557 - 2¹⁶ = 25565021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25630559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90748 + ... + 91029.

It is an arithmetic number, because the mean of its divisors is an integer number (4362672).

Almost surely, 2^25630557 is an apocalyptic number.

It is an amenable number.

25630557 is a deficient number, since it is larger than the sum of its proper divisors (9270819).

25630557 is a wasteful number, since it uses less digits than its factorization.

25630557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181827.

The product of its (nonzero) digits is 31500, while the sum is 33.

The square root of 25630557 is about 5062.6630344118. The cubic root of 25630557 is about 294.8397367557.

The spelling of 25630557 in words is "twenty-five million, six hundred thirty thousand, five hundred fifty-seven".