25652352661 has 6 divisors (see below), whose sum is σ = 27777399810. Its totient is φ = 23679094608.

The previous prime is 25652352659. The next prime is 25652352667. The reversal of 25652352661 is 16625325652.

It can be written as a sum of positive squares in 3 ways, for example, as 1938200625 + 23714152036 = 44025^2 + 153994^2 .

It is not a de Polignac number, because 25652352661 - 2¹ = 25652352659 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 (25652352667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75894366 + ... + 75894703.

It is an arithmetic number, because the mean of its divisors is an integer number (4629566635).

Almost surely, 2^25652352661 is an apocalyptic number.

It is an amenable number.

25652352661 is a deficient number, since it is larger than the sum of its proper divisors (2125047149).

25652352661 is a wasteful number, since it uses less digits than its factorization.

25652352661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151789095 (or 151789082 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The spelling of 25652352661 in words is "twenty-five billion, six hundred fifty-two million, three hundred fifty-two thousand, six hundred sixty-one".