25505555500250 has 32 divisors (see below), whose sum is σ = 54567314171136. Its totient is φ = 8744761885200.

The previous prime is 25505555500237. The next prime is 25505555500273. The reversal of 25505555500250 is 5200555550552.

It is a happy number.

It is a super-2 number, since 2×25505555500250² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7287299822 + ... + 7287303321.

It is an arithmetic number, because the mean of its divisors is an integer number (1705228567848).

Almost surely, 2^{25505555500250} is an apocalyptic number.

25505555500250 is an abundant number, since it is smaller than the sum of its proper divisors (29061758670886).

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

25505555500250 is a wasteful number, since it uses less digits than its factorization.

25505555500250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14574603167 (or 14574603157 counting only the distinct ones).

The product of its (nonzero) digits is 1562500, while the sum is 44.

The spelling of 25505555500250 in words is "twenty-five trillion, five hundred five billion, five hundred fifty-five million, five hundred thousand, two hundred fifty".