25450377768 has 128 divisors (see below), whose sum is σ = 73054617600. Its totient is φ = 8200958400.

The previous prime is 25450377763. The next prime is 25450377791. The reversal of 25450377768 is 86777305452.

It is a happy number.

25450377768 is a `hidden beast` number, since 2 + 5 + 4 + 503 + 7 + 77 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25450377763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9527073 + ... + 9529743.

It is an arithmetic number, because the mean of its divisors is an integer number (570739200).

Almost surely, 2^25450377768 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 25450377768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36527308800).

25450377768 is an abundant number, since it is smaller than the sum of its proper divisors (47604239832).

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

25450377768 is a wasteful number, since it uses less digits than its factorization.

25450377768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 54.

The spelling of 25450377768 in words is "twenty-five billion, four hundred fifty million, three hundred seventy-seven thousand, seven hundred sixty-eight".