25763397646440 has 32 divisors (see below), whose sum is σ = 77290192939680. Its totient is φ = 6870239372352.

The previous prime is 25763397646433. The next prime is 25763397646453. The reversal of 25763397646440 is 4464679336752.

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, 107347490074 + ... + 107347490313.

It is an arithmetic number, because the mean of its divisors is an integer number (2415318529365).

Almost surely, 2^{25763397646440} is an apocalyptic number.

25763397646440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25763397646440 is an abundant number, since it is smaller than the sum of its proper divisors (51526795293240).

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

25763397646440 is a wasteful number, since it uses less digits than its factorization.

25763397646440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214694980401 (or 214694980397 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 66.

The spelling of 25763397646440 in words is "twenty-five trillion, seven hundred sixty-three billion, three hundred ninety-seven million, six hundred forty-six thousand, four hundred forty".