25717253956 has 27 divisors (see below), whose sum is σ = 45357602493. Its totient is φ = 12758718960.

The previous prime is 25717253873. The next prime is 25717253957. The reversal of 25717253956 is 65935271752.

The square root of 25717253956 is 160366.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 283383556 + 25433870400 = 16834^2 + 159480^2 .

It is a super-2 number, since 2×25717253956² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25717253957) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 58052271 + ... + 58052713.

Almost surely, 2^25717253956 is an apocalyptic number.

25717253956 is the 160366-th square number.

It is an amenable number.

25717253956 is a deficient number, since it is larger than the sum of its proper divisors (19640348537).

25717253956 is an frugal number, since it uses more digits than its factorization.

25717253956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 626 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 52.

It can be divided in two parts, 2571 and 7253956, that added together give a palindrome (7256527).

The spelling of 25717253956 in words is "twenty-five billion, seven hundred seventeen million, two hundred fifty-three thousand, nine hundred fifty-six".