25294722552 has 256 divisors, whose sum is σ = 83781734400. Its totient is φ = 6981120000.

The previous prime is 25294722517. The next prime is 25294722571. The reversal of 25294722552 is 25522749252.

25294722552 is a `hidden beast` number, since 2 + 5 + 2 + 94 + 7 + 2 + 2 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25294722498 and 25294722507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1242052 + ... + 1262252.

It is an arithmetic number, because the mean of its divisors is an integer number (327272400).

Almost surely, 2^25294722552 is an apocalyptic number.

25294722552 is a gapful number since it is divisible by the number (22) 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 25294722552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41890867200).

25294722552 is an abundant number, since it is smaller than the sum of its proper divisors (58487011848).

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

25294722552 is a wasteful number, since it uses less digits than its factorization.

25294722552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20275 (or 20265 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 25294722552 in words is "twenty-five billion, two hundred ninety-four million, seven hundred twenty-two thousand, five hundred fifty-two".