25374578436 has 81 divisors (see below), whose sum is σ = 64946086023. Its totient is φ = 8353377360.

The previous prime is 25374578423. The next prime is 25374578461. The reversal of 25374578436 is 63487547352.

It is a happy number.

The square root of 25374578436 is 159294.

It is a perfect power (a square), and thus also a powerful number.

25374578436 is a `hidden beast` number, since 2 + 5 + 37 + 4 + 578 + 4 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 132851101 + ... + 132851291.

Almost surely, 2^25374578436 is an apocalyptic number.

25374578436 is the 159294-th square number.

It is an amenable number.

25374578436 is an abundant number, since it is smaller than the sum of its proper divisors (39571507587).

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

25374578436 is a wasteful number, since it uses less digits than its factorization.

25374578436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 335 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 54.

The spelling of 25374578436 in words is "twenty-five billion, three hundred seventy-four million, five hundred seventy-eight thousand, four hundred thirty-six".