25461560135661 has 32 divisors (see below), whose sum is σ = 37009244590080. Its totient is φ = 15476287425984.

The previous prime is 25461560135651. The next prime is 25461560135677. The reversal of 25461560135661 is 16653106516452.

It is not a de Polignac number, because 25461560135661 - 2³¹ = 25459412652013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25461560135611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13097580 + ... + 14915418.

It is an arithmetic number, because the mean of its divisors is an integer number (1156538893440).

Almost surely, 2^{25461560135661} is an apocalyptic number.

It is an amenable number.

25461560135661 is a deficient number, since it is larger than the sum of its proper divisors (11547684454419).

25461560135661 is a wasteful number, since it uses less digits than its factorization.

25461560135661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822265.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 25461560135661 in words is "twenty-five trillion, four hundred sixty-one billion, five hundred sixty million, one hundred thirty-five thousand, six hundred sixty-one".