25974222064 has 20 divisors (see below), whose sum is σ = 57514349104. Its totient is φ = 11131809408.

The previous prime is 25974222011. The next prime is 25974222077. The reversal of 25974222064 is 46022247952.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25974222064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115956237 + ... + 115956460.

Almost surely, 2^25974222064 is an apocalyptic number.

It is an amenable number.

25974222064 is an abundant number, since it is smaller than the sum of its proper divisors (31540127040).

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

25974222064 is a wasteful number, since it uses less digits than its factorization.

25974222064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231912712 (or 231912706 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 25974222064 in words is "twenty-five billion, nine hundred seventy-four million, two hundred twenty-two thousand, sixty-four".