190545865 has 8 divisors (see below), whose sum is σ = 232969608. Its totient is φ = 149560320.

The previous prime is 190545853. The next prime is 190545899. The reversal of 190545865 is 568545091.

It can be written as a sum of positive squares in 4 ways, for example, as 59969536 + 130576329 = 7744^2 + 11427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190545865 - 2¹¹ = 190543817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359256 + ... + 359785.

It is an arithmetic number, because the mean of its divisors is an integer number (29121201).

Almost surely, 2^190545865 is an apocalyptic number.

It is an amenable number.

190545865 is a deficient number, since it is larger than the sum of its proper divisors (42423743).

190545865 is an equidigital number, since it uses as much as digits as its factorization.

190545865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719099.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 190545865 is about 13803.8351554921. The cubic root of 190545865 is about 575.4397291654.

The spelling of 190545865 in words is "one hundred ninety million, five hundred forty-five thousand, eight hundred sixty-five".