25890740836 has 27 divisors (see below), whose sum is σ = 46411799763. Its totient is φ = 12637557240.

The previous prime is 25890740831. The next prime is 25890740851. The reversal of 25890740836 is 63804709852.

The square root of 25890740836 is 160906.

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

It is a super-2 number, since 2×25890740836² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25890740831) 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, 13836981 + ... + 13838851.

Almost surely, 2^25890740836 is an apocalyptic number.

25890740836 is the 160906-th square number.

It is an amenable number.

25890740836 is a deficient number, since it is larger than the sum of its proper divisors (20521058927).

25890740836 is an frugal number, since it uses more digits than its factorization.

25890740836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 25890740836 in words is "twenty-five billion, eight hundred ninety million, seven hundred forty thousand, eight hundred thirty-six".