25642311530 has 96 divisors (see below), whose sum is σ = 53079691392. Its totient is φ = 8895455360.

The previous prime is 25642311511. The next prime is 25642311533. The reversal of 25642311530 is 3511324652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25642311533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12995624 + ... + 12997596.

It is an arithmetic number, because the mean of its divisors is an integer number (552913452).

Almost surely, 2^25642311530 is an apocalyptic number.

25642311530 is an abundant number, since it is smaller than the sum of its proper divisors (27437379862).

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

25642311530 is a wasteful number, since it uses less digits than its factorization.

25642311530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 2481 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 25642311530 in words is "twenty-five billion, six hundred forty-two million, three hundred eleven thousand, five hundred thirty".