25649715132 has 36 divisors (see below), whose sum is σ = 64950381496. Its totient is φ = 8534924640.

The previous prime is 25649715131. The next prime is 25649715139. The reversal of 25649715132 is 23151794652.

25649715132 is a `hidden beast` number, since 2 + 5 + 6 + 497 + 151 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25649715131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 603343 + ... + 644454.

Almost surely, 2^25649715132 is an apocalyptic number.

It is an amenable number.

25649715132 is an abundant number, since it is smaller than the sum of its proper divisors (39300666364).

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

25649715132 is a wasteful number, since it uses less digits than its factorization.

25649715132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248378 (or 1248373 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 25649715132 in words is "twenty-five billion, six hundred forty-nine million, seven hundred fifteen thousand, one hundred thirty-two".