25555000550 has 12 divisors (see below), whose sum is σ = 47532301116. Its totient is φ = 10222000200.

The previous prime is 25555000547. The next prime is 25555000571. The reversal of 25555000550 is 5500055552.

It is a super-2 number, since 2×25555000550² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255549956 + ... + 255550055.

It is an arithmetic number, because the mean of its divisors is an integer number (3961025093).

Almost surely, 2^25555000550 is an apocalyptic number.

25555000550 is a deficient number, since it is larger than the sum of its proper divisors (21977300566).

25555000550 is a wasteful number, since it uses less digits than its factorization.

25555000550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511100023 (or 511100018 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 32.

The spelling of 25555000550 in words is "twenty-five billion, five hundred fifty-five million, five hundred fifty", and thus it is an aban number.