25939001394 has 12 divisors (see below), whose sum is σ = 56201169726. Its totient is φ = 8646333792.

The previous prime is 25939001377. The next prime is 25939001399. The reversal of 25939001394 is 49310093952.

25939001394 is a `hidden beast` number, since 259 + 3 + 9 + 0 + 0 + 1 + 394 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25938713025 + 288369 = 161055^2 + 537^2 .

It is not an unprimeable number, because it can be changed into a prime (25939001399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720527799 + ... + 720527834.

Almost surely, 2^25939001394 is an apocalyptic number.

25939001394 is an abundant number, since it is smaller than the sum of its proper divisors (30262168332).

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

25939001394 is a wasteful number, since it uses less digits than its factorization.

25939001394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441055641 (or 1441055638 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 25939001394 in words is "twenty-five billion, nine hundred thirty-nine million, one thousand, three hundred ninety-four".