25979369766 has 64 divisors (see below), whose sum is σ = 61479874560. Its totient is φ = 7161799680.

The previous prime is 25979369749. The next prime is 25979369771. The reversal of 25979369766 is 66796397952.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25979369766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 409170 + ... + 468378.

It is an arithmetic number, because the mean of its divisors is an integer number (960623040).

Almost surely, 2^25979369766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25979369766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30739937280).

25979369766 is an abundant number, since it is smaller than the sum of its proper divisors (35500504794).

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

25979369766 is a wasteful number, since it uses less digits than its factorization.

25979369766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59589.

The product of its digits is 231472080, while the sum is 69.

The spelling of 25979369766 in words is "twenty-five billion, nine hundred seventy-nine million, three hundred sixty-nine thousand, seven hundred sixty-six".