25697776776 has 256 divisors, whose sum is σ = 81036288000. Its totient is φ = 6761567232.

The previous prime is 25697776751. The next prime is 25697776777. The reversal of 25697776776 is 67767779652.

It is a self number, because there is not a number n which added to its sum of digits gives 25697776776.

It is not an unprimeable number, because it can be changed into a prime (25697776777) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6575415 + ... + 6579321.

It is an arithmetic number, because the mean of its divisors is an integer number (316548000).

Almost surely, 2^25697776776 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 25697776776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40518144000).

25697776776 is an abundant number, since it is smaller than the sum of its proper divisors (55338511224).

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

25697776776 is a wasteful number, since it uses less digits than its factorization.

25697776776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001 (or 3983 counting only the distinct ones).

The product of its digits is 326728080, while the sum is 69.

The spelling of 25697776776 in words is "twenty-five billion, six hundred ninety-seven million, seven hundred seventy-six thousand, seven hundred seventy-six".