25634450964 has 12 divisors (see below), whose sum is σ = 59813718944. Its totient is φ = 8544816984.

The previous prime is 25634450953. The next prime is 25634450969. The reversal of 25634450964 is 46905443652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25634450969) 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, 1068102112 + ... + 1068102135.

Almost surely, 2^25634450964 is an apocalyptic number.

It is an amenable number.

25634450964 is an abundant number, since it is smaller than the sum of its proper divisors (34179267980).

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

25634450964 is a wasteful number, since it uses less digits than its factorization.

25634450964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136204254 (or 2136204252 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 25634450964 in words is "twenty-five billion, six hundred thirty-four million, four hundred fifty thousand, nine hundred sixty-four".