25226661402 has 12 divisors (see below), whose sum is σ = 54657766410. Its totient is φ = 8408887128.

The previous prime is 25226661373. The next prime is 25226661413. The reversal of 25226661402 is 20416662252.

It can be written as a sum of positive squares in only one way, i.e., 25135248681 + 91412721 = 158541^2 + 9561^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 700740577 + ... + 700740612.

Almost surely, 2^25226661402 is an apocalyptic number.

25226661402 is an abundant number, since it is smaller than the sum of its proper divisors (29431105008).

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

25226661402 is a wasteful number, since it uses less digits than its factorization.

25226661402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401481197 (or 1401481194 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 25226661402 in words is "twenty-five billion, two hundred twenty-six million, six hundred sixty-one thousand, four hundred two".