25085969973 has 10 divisors (see below), whose sum is σ = 37474103414. Its totient is φ = 16723979928.

The previous prime is 25085969969. The next prime is 25085970001. The reversal of 25085969973 is 37996958052.

25085969973 is a `hidden beast` number, since 2 + 508 + 59 + 6 + 9 + 9 + 73 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19427620689 + 5658349284 = 139383^2 + 75222^2 .

It is not a de Polignac number, because 25085969973 - 2² = 25085969969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25085969973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25085969273) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 154851586 + ... + 154851747.

Almost surely, 2^25085969973 is an apocalyptic number.

It is an amenable number.

25085969973 is a deficient number, since it is larger than the sum of its proper divisors (12388133441).

25085969973 is an equidigital number, since it uses as much as digits as its factorization.

25085969973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309703345 (or 309703336 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 63.

It can be divided in two parts, 2508596 and 9973, that added together give a square (2518569 = 1587²).

The spelling of 25085969973 in words is "twenty-five billion, eighty-five million, nine hundred sixty-nine thousand, nine hundred seventy-three".