25121326845924 has 99 divisors (see below), whose sum is σ = 65949505511113. Its totient is φ = 8372963652192.

The previous prime is 25121326845919. The next prime is 25121326845943. The reversal of 25121326845924 is 42954862312152.

The square root of 25121326845924 is 5012118.

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

25121326845924 is a `hidden beast` number, since 2 + 5 + 1 + 21 + 3 + 26 + 8 + 4 + 592 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10335517712100 + 14785809133824 = 3214890^2 + 3845232^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 2435884192 + ... + 2435894504.

Almost surely, 2^{25121326845924} is an apocalyptic number.

25121326845924 is the 5012118-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25121326845924

25121326845924 is an abundant number, since it is smaller than the sum of its proper divisors (40828178665189).

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

25121326845924 is an frugal number, since it uses more digits than its factorization.

25121326845924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20660 (or 10318 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 25121326845924 in words is "twenty-five trillion, one hundred twenty-one billion, three hundred twenty-six million, eight hundred forty-five thousand, nine hundred twenty-four".