25696869747264 has 63 divisors (see below), whose sum is σ = 73655786138857. Its totient is φ = 8565582695424.

The previous prime is 25696869747259. The next prime is 25696869747337. The reversal of 25696869747264 is 46274796869652.

The square root of 25696869747264 is 5069208.

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

25696869747264 is a `hidden beast` number, since 2 + 5 + 6 + 9 + 6 + 86 + 9 + 7 + 472 + 64 = 666.

25696869747264 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 17484105960000 + 8212763787264 = 4181400^2 + 2865792^2 .

It is a super-2 number, since 2×25696869747264² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 121555384 + ... + 121766600.

Almost surely, 2^{25696869747264} is an apocalyptic number.

25696869747264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

25696869747264 is the 5069208-th square number.

It is an amenable number.

25696869747264 is an abundant number, since it is smaller than the sum of its proper divisors (47958916391593).

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

25696869747264 is an frugal number, since it uses more digits than its factorization.

25696869747264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422452 (or 211222 counting only the distinct ones).

The product of its digits is 13168189440, while the sum is 81.

The spelling of 25696869747264 in words is "twenty-five trillion, six hundred ninety-six billion, eight hundred sixty-nine million, seven hundred forty-seven thousand, two hundred sixty-four".