25777720580 has 96 divisors (see below), whose sum is σ = 58482514944. Its totient is φ = 9520118784.

The previous prime is 25777720559. The next prime is 25777720607. The reversal of 25777720580 is 8502777752.

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, 1570094 + ... + 1586426.

It is an arithmetic number, because the mean of its divisors is an integer number (609192864).

Almost surely, 2^25777720580 is an apocalyptic number.

25777720580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25777720580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29241257472).

25777720580 is an abundant number, since it is smaller than the sum of its proper divisors (32704794364).

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

25777720580 is a wasteful number, since it uses less digits than its factorization.

25777720580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16485 (or 16483 counting only the distinct ones).

The product of its (nonzero) digits is 1920800, while the sum is 50.

The spelling of 25777720580 in words is "twenty-five billion, seven hundred seventy-seven million, seven hundred twenty thousand, five hundred eighty".