195401855 has 16 divisors (see below), whose sum is σ = 264621600. Its totient is φ = 137208960.

The previous prime is 195401851. The next prime is 195401861. The reversal of 195401855 is 558104591.

It is not a de Polignac number, because 195401855 - 2² = 195401851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195401851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59660 + ... + 62849.

It is an arithmetic number, because the mean of its divisors is an integer number (16538850).

Almost surely, 2^195401855 is an apocalyptic number.

195401855 is a deficient number, since it is larger than the sum of its proper divisors (69219745).

195401855 is a wasteful number, since it uses less digits than its factorization.

195401855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122554.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 195401855 is about 13978.6213554842. The cubic root of 195401855 is about 580.2870705349.

The spelling of 195401855 in words is "one hundred ninety-five million, four hundred one thousand, eight hundred fifty-five".