25525905787416 has 64 divisors (see below), whose sum is σ = 67807332662400. Its totient is φ = 7979830000128.

The previous prime is 25525905787409. The next prime is 25525905787451. The reversal of 25525905787416 is 61478750952552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110420746 + ... + 110651673.

It is an arithmetic number, because the mean of its divisors is an integer number (1059489572850).

Almost surely, 2^{25525905787416} is an apocalyptic number.

It is an amenable number.

25525905787416 is an abundant number, since it is smaller than the sum of its proper divisors (42281426874984).

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

25525905787416 is a wasteful number, since it uses less digits than its factorization.

25525905787416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221072728 (or 221072724 counting only the distinct ones).

The product of its (nonzero) digits is 211680000, while the sum is 66.

The spelling of 25525905787416 in words is "twenty-five trillion, five hundred twenty-five billion, nine hundred five million, seven hundred eighty-seven thousand, four hundred sixteen".