25651111110061 has 4 divisors (see below), whose sum is σ = 25651378993500. Its totient is φ = 25650843226624.

The previous prime is 25651111110019. The next prime is 25651111110089. The reversal of 25651111110061 is 16001111115652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9957874472100 + 15693236637961 = 3155610^2 + 3961469^2 .

It is a cyclic number.

It is not a de Polignac number, because 25651111110061 - 2²⁹ = 25650574239149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25651111110661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133798036 + ... + 133989613.

It is an arithmetic number, because the mean of its divisors is an integer number (6412844748375).

Almost surely, 2^{25651111110061} is an apocalyptic number.

It is an amenable number.

25651111110061 is a deficient number, since it is larger than the sum of its proper divisors (267883439).

25651111110061 is an equidigital number, since it uses as much as digits as its factorization.

25651111110061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267883438.

The product of its (nonzero) digits is 1800, while the sum is 31.

The spelling of 25651111110061 in words is "twenty-five trillion, six hundred fifty-one billion, one hundred eleven million, one hundred ten thousand, sixty-one".