25388604780 has 288 divisors, whose sum is σ = 94556947968. Its totient is φ = 4965058560.

The previous prime is 25388604779. The next prime is 25388604803. The reversal of 25388604780 is 8740688352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 849247 + ... + 878633.

It is an arithmetic number, because the mean of its divisors is an integer number (328322736).

Almost surely, 2^25388604780 is an apocalyptic number.

25388604780 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 25388604780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47278473984).

25388604780 is an abundant number, since it is smaller than the sum of its proper divisors (69168343188).

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

25388604780 is a wasteful number, since it uses less digits than its factorization.

25388604780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29445 (or 29432 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

It can be divided in two parts, 2538860 and 4780, that added together give a triangular number (2543640 = T₂₂₅₅).

The spelling of 25388604780 in words is "twenty-five billion, three hundred eighty-eight million, six hundred four thousand, seven hundred eighty".