25697221332 has 24 divisors (see below), whose sum is σ = 60015072096. Its totient is φ = 8557899168.

The previous prime is 25697221331. The next prime is 25697221337. The reversal of 25697221332 is 23312279652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25697221331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966498 + ... + 992729.

It is an arithmetic number, because the mean of its divisors is an integer number (2500628004).

Almost surely, 2^25697221332 is an apocalyptic number.

It is an amenable number.

25697221332 is an abundant number, since it is smaller than the sum of its proper divisors (34317850764).

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

25697221332 is a wasteful number, since it uses less digits than its factorization.

25697221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960327 (or 1960325 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The spelling of 25697221332 in words is "twenty-five billion, six hundred ninety-seven million, two hundred twenty-one thousand, three hundred thirty-two".