25717533860 has 12 divisors (see below), whose sum is σ = 54006821148. Its totient is φ = 10287013536.

The previous prime is 25717533857. The next prime is 25717533889. The reversal of 25717533860 is 6833571752.

It can be written as a sum of positive squares in 2 ways, for example, as 15545601124 + 10171932736 = 124682^2 + 100856^2 .

It is a super-2 number, since 2×25717533860² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642938327 + ... + 642938366.

It is an arithmetic number, because the mean of its divisors is an integer number (4500568429).

Almost surely, 2^25717533860 is an apocalyptic number.

25717533860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25717533860 is an abundant number, since it is smaller than the sum of its proper divisors (28289287288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25717533860 is a wasteful number, since it uses less digits than its factorization.

25717533860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285876702 (or 1285876700 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 25717533860 in words is "twenty-five billion, seven hundred seventeen million, five hundred thirty-three thousand, eight hundred sixty".