25687766088 has 128 divisors (see below), whose sum is σ = 75612787200. Its totient is φ = 8052452352.

The previous prime is 25687766051. The next prime is 25687766101. The reversal of 25687766088 is 88066778652.

25687766088 is a `hidden beast` number, since 2 + 568 + 7 + 7 + 6 + 60 + 8 + 8 = 666.

It is a super-2 number, since 2×25687766088² (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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6890481 + ... + 6894207.

It is an arithmetic number, because the mean of its divisors is an integer number (590724900).

Almost surely, 2^25687766088 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 25687766088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37806393600).

25687766088 is an abundant number, since it is smaller than the sum of its proper divisors (49925021112).

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

25687766088 is a wasteful number, since it uses less digits than its factorization.

25687766088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5636 (or 5626 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 25687766088 in words is "twenty-five billion, six hundred eighty-seven million, seven hundred sixty-six thousand, eighty-eight".