25504015122 has 48 divisors (see below), whose sum is σ = 56978655552. Its totient is φ = 8238564000.

The previous prime is 25504015073. The next prime is 25504015123. The reversal of 25504015122 is 22151040552.

25504015122 is a `hidden beast` number, since 2 + 5 + 504 + 0 + 151 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (25504015123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90883 + ... + 243449.

It is an arithmetic number, because the mean of its divisors is an integer number (1187055324).

Almost surely, 2^25504015122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25504015122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28489327776).

25504015122 is an abundant number, since it is smaller than the sum of its proper divisors (31474640430).

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

25504015122 is a wasteful number, since it uses less digits than its factorization.

25504015122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152863 (or 152860 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 25504015122 its reverse (22151040552), we get a palindrome (47655055674).

The spelling of 25504015122 in words is "twenty-five billion, five hundred four million, fifteen thousand, one hundred twenty-two".