25652849661 has 32 divisors (see below), whose sum is σ = 38211993600. Its totient is φ = 17008593840.

The previous prime is 25652849641. The next prime is 25652849683. The reversal of 25652849661 is 16694825652.

25652849661 is a `hidden beast` number, since 2 + 56 + 528 + 4 + 9 + 6 + 61 = 666.

It is not a de Polignac number, because 25652849661 - 2⁶ = 25652849597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25652849598 and 25652849607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25652849641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6237996 + ... + 6242106.

It is an arithmetic number, because the mean of its divisors is an integer number (1194124800).

Almost surely, 2^25652849661 is an apocalyptic number.

It is an amenable number.

25652849661 is a deficient number, since it is larger than the sum of its proper divisors (12559143939).

25652849661 is a wasteful number, since it uses less digits than its factorization.

25652849661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326 (or 5320 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 25652849661 in words is "twenty-five billion, six hundred fifty-two million, eight hundred forty-nine thousand, six hundred sixty-one".