195555550 has 12 divisors (see below), whose sum is σ = 363733416. Its totient is φ = 78222200.

The previous prime is 195555511. The next prime is 195555571. The reversal of 195555550 is 55555591.

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, 1955506 + ... + 1955605.

It is an arithmetic number, because the mean of its divisors is an integer number (30311118).

Almost surely, 2^195555550 is an apocalyptic number.

195555550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195555550 is a deficient number, since it is larger than the sum of its proper divisors (168177866).

195555550 is a wasteful number, since it uses less digits than its factorization.

195555550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911123 (or 3911118 counting only the distinct ones).

The product of its (nonzero) digits is 140625, while the sum is 40.

The square root of 195555550 is about 13984.1177769640. The cubic root of 195555550 is about 580.4391739150.

The spelling of 195555550 in words is "one hundred ninety-five million, five hundred fifty-five thousand, five hundred fifty".