25052802780 has 24 divisors (see below), whose sum is σ = 70147847952. Its totient is φ = 6680747392.

The previous prime is 25052802769. The next prime is 25052802781. The reversal of 25052802780 is 8720825052.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25052802781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208773297 + ... + 208773416.

It is an arithmetic number, because the mean of its divisors is an integer number (2922826998).

Almost surely, 2^25052802780 is an apocalyptic number.

25052802780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25052802780 is an abundant number, since it is smaller than the sum of its proper divisors (45095045172).

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

25052802780 is a wasteful number, since it uses less digits than its factorization.

25052802780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417546725 (or 417546723 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The spelling of 25052802780 in words is "twenty-five billion, fifty-two million, eight hundred two thousand, seven hundred eighty".