25378505604 has 30 divisors (see below), whose sum is σ = 66344427534. Its totient is φ = 8459501760.

The previous prime is 25378505591. The next prime is 25378505623. The reversal of 25378505604 is 40650587352.

25378505604 is a `hidden beast` number, since 2 + 5 + 3 + 7 + 85 + 0 + 560 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18522665604 + 6855840000 = 136098^2 + 82800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25378505604.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39164037 + ... + 39164684.

Almost surely, 2^25378505604 is an apocalyptic number.

It is an amenable number.

25378505604 is an abundant number, since it is smaller than the sum of its proper divisors (40965921930).

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

25378505604 is a wasteful number, since it uses less digits than its factorization.

25378505604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78328737 (or 78328726 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 25378505604 in words is "twenty-five billion, three hundred seventy-eight million, five hundred five thousand, six hundred four".