25633036644 has 12 divisors (see below), whose sum is σ = 59810418864. Its totient is φ = 8544345544.

The previous prime is 25633036643. The next prime is 25633036657. The reversal of 25633036644 is 44663033652.

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

It is a junction number, because it is equal to n+sod(n) for n = 25633036596 and 25633036605.

It is not an unprimeable number, because it can be changed into a prime (25633036643) 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, 1068043182 + ... + 1068043205.

It is an arithmetic number, because the mean of its divisors is an integer number (4984201572).

Almost surely, 2^25633036644 is an apocalyptic number.

It is an amenable number.

25633036644 is an abundant number, since it is smaller than the sum of its proper divisors (34177382220).

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

25633036644 is a wasteful number, since it uses less digits than its factorization.

25633036644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136086394 (or 2136086392 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 42.

The spelling of 25633036644 in words is "twenty-five billion, six hundred thirty-three million, thirty-six thousand, six hundred forty-four".