25630135421 has 12 divisors (see below), whose sum is σ = 28262593632. Its totient is φ = 23225169000.

The previous prime is 25630135393. The next prime is 25630135451. The reversal of 25630135421 is 12453103652.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25630135421 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25630135451) 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, 302915 + ... + 378176.

It is an arithmetic number, because the mean of its divisors is an integer number (2355216136).

Almost surely, 2^25630135421 is an apocalyptic number.

It is an amenable number.

25630135421 is a deficient number, since it is larger than the sum of its proper divisors (2632458211).

25630135421 is a wasteful number, since it uses less digits than its factorization.

25630135421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681424 (or 681413 counting only the distinct ones).

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

It can be divided in two parts, 25630 and 135421, that added together give a 5-th power (161051 = 11⁵).

The spelling of 25630135421 in words is "twenty-five billion, six hundred thirty million, one hundred thirty-five thousand, four hundred twenty-one".