25054166550 has 48 divisors (see below), whose sum is σ = 71010669312. Its totient is φ = 5726666400.

The previous prime is 25054166549. The next prime is 25054166561. The reversal of 25054166550 is 5566145052.

It is a happy number.

It is a super-2 number, since 2×25054166550² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25054166499 and 25054166508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11929506 + ... + 11931605.

It is an arithmetic number, because the mean of its divisors is an integer number (1479388944).

Almost surely, 2^25054166550 is an apocalyptic number.

25054166550 is an abundant number, since it is smaller than the sum of its proper divisors (45956502762).

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

25054166550 is a wasteful number, since it uses less digits than its factorization.

25054166550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23861133 (or 23861128 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 25054166550 in words is "twenty-five billion, fifty-four million, one hundred sixty-six thousand, five hundred fifty".