25172995600 has 45 divisors (see below), whose sum is σ = 60485746503. Its totient is φ = 10067928960.

The previous prime is 25172995567. The next prime is 25172995607. The reversal of 25172995600 is 659927152.

The square root of 25172995600 is 158660.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3193154064 + 21979841536 = 56508^2 + 148256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25172995607) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3169234 + ... + 3177166.

Almost surely, 2^25172995600 is an apocalyptic number.

25172995600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

25172995600 is the 158660-th square number.

It is an amenable number.

25172995600 is an abundant number, since it is smaller than the sum of its proper divisors (35312750903).

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

25172995600 is an frugal number, since it uses more digits than its factorization.

25172995600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15884 (or 7940 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 25172995600 in words is "twenty-five billion, one hundred seventy-two million, nine hundred ninety-five thousand, six hundred".