25477799568 has 240 divisors, whose sum is σ = 75111025920. Its totient is φ = 7395987456.

The previous prime is 25477799563. The next prime is 25477799587. The reversal of 25477799568 is 86599777452.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (25477799563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26077096 + ... + 26078072.

It is an arithmetic number, because the mean of its divisors is an integer number (312962608).

Almost surely, 2^25477799568 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 25477799568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37555512960).

25477799568 is an abundant number, since it is smaller than the sum of its proper divisors (49633226352).

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

25477799568 is a wasteful number, since it uses less digits than its factorization.

25477799568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1097 counting only the distinct ones).

The product of its digits is 266716800, while the sum is 69.

The spelling of 25477799568 in words is "twenty-five billion, four hundred seventy-seven million, seven hundred ninety-nine thousand, five hundred sixty-eight".