25717564 has 12 divisors (see below), whose sum is σ = 47374600. Its totient is φ = 12181968.

The previous prime is 25717547. The next prime is 25717567. The reversal of 25717564 is 46571752.

It is a super-2 number, since 2×25717564² = 1322786196188192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25717567) 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, 169119 + ... + 169270.

Almost surely, 2^25717564 is an apocalyptic number.

It is an amenable number.

25717564 is a deficient number, since it is larger than the sum of its proper divisors (21657036).

25717564 is a wasteful number, since it uses less digits than its factorization.

25717564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338412 (or 338410 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 25717564 is about 5071.2487613999. The cubic root of 25717564 is about 295.1729867345.

The spelling of 25717564 in words is "twenty-five million, seven hundred seventeen thousand, five hundred sixty-four".