25661457135352 has 32 divisors (see below), whose sum is σ = 50303197399680. Its totient is φ = 12249404465760.

The previous prime is 25661457135317. The next prime is 25661457135389. The reversal of 25661457135352 is 25353175416652.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25661457135293 and 25661457135302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133234974 + ... + 133427437.

It is an arithmetic number, because the mean of its divisors is an integer number (1571974918740).

Almost surely, 2^{25661457135352} is an apocalyptic number.

It is an amenable number.

25661457135352 is a deficient number, since it is larger than the sum of its proper divisors (24641740264328).

25661457135352 is a wasteful number, since it uses less digits than its factorization.

25661457135352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266662963 (or 266662959 counting only the distinct ones).

The product of its digits is 22680000, while the sum is 55.

The spelling of 25661457135352 in words is "twenty-five trillion, six hundred sixty-one billion, four hundred fifty-seven million, one hundred thirty-five thousand, three hundred fifty-two".