25620451768 has 8 divisors (see below), whose sum is σ = 48038347080. Its totient is φ = 12810225880.

The previous prime is 25620451757. The next prime is 25620451841. The reversal of 25620451768 is 86715402652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601278228 + ... + 1601278243.

It is an arithmetic number, because the mean of its divisors is an integer number (6004793385).

Almost surely, 2^25620451768 is an apocalyptic number.

It is an amenable number.

25620451768 is a deficient number, since it is larger than the sum of its proper divisors (22417895312).

25620451768 is a wasteful number, since it uses less digits than its factorization.

25620451768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202556477 (or 3202556473 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 25620451768 in words is "twenty-five billion, six hundred twenty million, four hundred fifty-one thousand, seven hundred sixty-eight".