25249527801 has 9 divisors (see below), whose sum is σ = 36472228741. Its totient is φ = 16832700732.

The previous prime is 25249527769. The next prime is 25249527847. The reversal of 25249527801 is 10872594252.

The square root of 25249527801 is 158901.

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

25249527801 is a `hidden beast` number, since 2 + 5 + 2 + 49 + 527 + 80 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 25249527801 - 2⁵ = 25249527769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25249527881) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 450220 + ... + 503186.

Almost surely, 2^25249527801 is an apocalyptic number.

25249527801 is the 158901-st square number.

25249527801 is the 79451-st centered octagonal number.

It is an amenable number.

25249527801 is a deficient number, since it is larger than the sum of its proper divisors (11222700940).

25249527801 is an frugal number, since it uses more digits than its factorization.

25249527801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105940 (or 52970 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 25249527801 in words is "twenty-five billion, two hundred forty-nine million, five hundred twenty-seven thousand, eight hundred one".