25422579185261 has 16 divisors (see below), whose sum is σ = 25851808555440. Its totient is φ = 24993755297280.

The previous prime is 25422579185177. The next prime is 25422579185321. The reversal of 25422579185261 is 16258197522452.

It can be written as a sum of positive squares in 8 ways, for example, as 967764062500 + 24454815122761 = 983750^2 + 4945181^2 .

It is a cyclic number.

It is not a de Polignac number, because 25422579185261 - 2²² = 25422574990957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25422579185261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25422579181261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1394613695 + ... + 1394631923.

It is an arithmetic number, because the mean of its divisors is an integer number (1615738034715).

Almost surely, 2^{25422579185261} is an apocalyptic number.

It is an amenable number.

25422579185261 is a deficient number, since it is larger than the sum of its proper divisors (429229370179).

25422579185261 is a wasteful number, since it uses less digits than its factorization.

25422579185261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28064.

The product of its digits is 24192000, while the sum is 59.

The spelling of 25422579185261 in words is "twenty-five trillion, four hundred twenty-two billion, five hundred seventy-nine million, one hundred eighty-five thousand, two hundred sixty-one".