25716380556 has 96 divisors (see below), whose sum is σ = 64247758848. Its totient is φ = 7977830400.

The previous prime is 25716380537. The next prime is 25716380597. The reversal of 25716380556 is 65508361752.

It is a super-2 number, since 2×25716380556² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7175541 + ... + 7179123.

It is an arithmetic number, because the mean of its divisors is an integer number (669247488).

Almost surely, 2^25716380556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25716380556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32123879424).

25716380556 is an abundant number, since it is smaller than the sum of its proper divisors (38531378292).

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

25716380556 is a wasteful number, since it uses less digits than its factorization.

25716380556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991 (or 3989 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 25716380556 in words is "twenty-five billion, seven hundred sixteen million, three hundred eighty thousand, five hundred fifty-six".