25790147780 has 12 divisors (see below), whose sum is σ = 54159310380. Its totient is φ = 10316059104.

The previous prime is 25790147771. The next prime is 25790147863. The reversal of 25790147780 is 8774109752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2909955136 + 22880192644 = 53944^2 + 151262^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644753675 + ... + 644753714.

It is an arithmetic number, because the mean of its divisors is an integer number (4513275865).

Almost surely, 2^25790147780 is an apocalyptic number.

25790147780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25790147780 is an abundant number, since it is smaller than the sum of its proper divisors (28369162600).

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

25790147780 is a wasteful number, since it uses less digits than its factorization.

25790147780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289507398 (or 1289507396 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 25790147780 in words is "twenty-five billion, seven hundred ninety million, one hundred forty-seven thousand, seven hundred eighty".