25304511668881 has 3 divisors (see below), whose sum is σ = 25304516699241. Its totient is φ = 25304506638522.

The previous prime is 25304511668797. The next prime is 25304511668893. The reversal of 25304511668881 is 18886611540352.

The square root of 25304511668881 is 5030359.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25304511668881 - 2¹³ = 25304511660689 is a prime.

It is a super-2 number, since 2×25304511668881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25304511668081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2515180 + ... + 7545538.

It is an arithmetic number, because the mean of its divisors is an integer number (8434838899747).

Almost surely, 2^{25304511668881} is an apocalyptic number.

25304511668881 is the 5030359-th square number.

25304511668881 is the 2515180-th centered octagonal number.

It is an amenable number.

25304511668881 is a deficient number, since it is larger than the sum of its proper divisors (5030360).

25304511668881 is an frugal number, since it uses more digits than its factorization.

25304511668881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060718 (or 5030359 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 25304511668881 in words is "twenty-five trillion, three hundred four billion, five hundred eleven million, six hundred sixty-eight thousand, eight hundred eighty-one".