25641434641616 has 40 divisors (see below), whose sum is σ = 52370711824800. Its totient is φ = 12128365284480.

The previous prime is 25641434641607. The next prime is 25641434641699. The reversal of 25641434641616 is 61614643414652.

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, 60822371 + ... + 61242498.

It is an arithmetic number, because the mean of its divisors is an integer number (1309267795620).

Almost surely, 2^{25641434641616} is an apocalyptic number.

It is an amenable number.

25641434641616 is an abundant number, since it is smaller than the sum of its proper divisors (26729277183184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25641434641616 is a wasteful number, since it uses less digits than its factorization.

25641434641616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122065587 (or 122065581 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 53.

The spelling of 25641434641616 in words is "twenty-five trillion, six hundred forty-one billion, four hundred thirty-four million, six hundred forty-one thousand, six hundred sixteen".