25276565683981 has 4 divisors (see below), whose sum is σ = 25300893467200. Its totient is φ = 25252237900764.

The previous prime is 25276565683969. The next prime is 25276565683987. The reversal of 25276565683981 is 18938656567252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25276565683981 - 2¹³ = 25276565675789 is a prime.

It is a super-2 number, since 2×25276565683981² (a number of 28 digits) contains 22 as substring.

It is the 5027581-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25276565683987) by changing a digit.

It is a nontrivial repunit in base 5027580.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12163890051 + ... + 12163892128.

It is an arithmetic number, because the mean of its divisors is an integer number (6325223366800).

Almost surely, 2^{25276565683981} is an apocalyptic number.

It is an amenable number.

25276565683981 is a deficient number, since it is larger than the sum of its proper divisors (24327783219).

25276565683981 is a wasteful number, since it uses less digits than its factorization.

25276565683981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24327783218.

The product of its digits is 1306368000, while the sum is 73.

The spelling of 25276565683981 in words is "twenty-five trillion, two hundred seventy-six billion, five hundred sixty-five million, six hundred eighty-three thousand, nine hundred eighty-one".