25049414393721 has 9 divisors (see below), whose sum is σ = 36182509145679. Its totient is φ = 16699599585936.

The previous prime is 25049414393719. The next prime is 25049414393723. The reversal of 25049414393721 is 12739341494052.

The square root of 25049414393721 is 5004939.

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

25049414393721 is a `hidden beast` number, since 2 + 5 + 0 + 494 + 1 + 43 + 93 + 7 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (25049414393719) and next prime (25049414393723).

It can be written as a sum of positive squares in only one way, i.e., 2715623847225 + 22333790546496 = 1647915^2 + 4725864^2 .

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

It is not a de Polignac number, because 25049414393721 - 2¹ = 25049414393719 is a prime.

It is a super-2 number, since 2×25049414393721² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25049414393723) 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, 14180661 + ... + 15848973.

Almost surely, 2^{25049414393721} is an apocalyptic number.

25049414393721 is the 5004939-th square number.

25049414393721 is the 2502470-th centered octagonal number.

It is an amenable number.

25049414393721 is a deficient number, since it is larger than the sum of its proper divisors (11133094751958).

25049414393721 is an frugal number, since it uses more digits than its factorization.

25049414393721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336632 (or 1668316 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 25049414393721 in words is "twenty-five trillion, forty-nine billion, four hundred fourteen million, three hundred ninety-three thousand, seven hundred twenty-one".