25199022564 has 45 divisors (see below), whose sum is σ = 65882693107. Its totient is φ = 8398721736.

The previous prime is 25199022559. The next prime is 25199022619. The reversal of 25199022564 is 46522099152.

The square root of 25199022564 is 158742.

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

It is a super-2 number, since 2×25199022564² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2852947 + ... + 2861765.

Almost surely, 2^25199022564 is an apocalyptic number.

25199022564 is the 158742-nd square number.

It is an amenable number.

25199022564 is an abundant number, since it is smaller than the sum of its proper divisors (40683670543).

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

25199022564 is an frugal number, since it uses more digits than its factorization.

25199022564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17654 (or 8824 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 25199022564 in words is "twenty-five billion, one hundred ninety-nine million, twenty-two thousand, five hundred sixty-four".