25557653 has 4 divisors (see below), whose sum is σ = 27881088. Its totient is φ = 23234220.

The previous prime is 25557643. The next prime is 25557659. The reversal of 25557653 is 35675552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25557653 - 2¹⁸ = 25295509 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 (25557659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161701 + ... + 1161722.

It is an arithmetic number, because the mean of its divisors is an integer number (6970272).

Almost surely, 2^25557653 is an apocalyptic number.

It is an amenable number.

25557653 is a deficient number, since it is larger than the sum of its proper divisors (2323435).

25557653 is a wasteful number, since it uses less digits than its factorization.

25557653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323434.

The product of its digits is 157500, while the sum is 38.

The square root of 25557653 is about 5055.4577438645. The cubic root of 25557653 is about 294.5599222010.

The spelling of 25557653 in words is "twenty-five million, five hundred fifty-seven thousand, six hundred fifty-three".