190641765 has 16 divisors (see below), whose sum is σ = 306341568. Its totient is φ = 101237376.

The previous prime is 190641749. The next prime is 190641769. The reversal of 190641765 is 567146091.

It is not a de Polignac number, because 190641765 - 2⁴ = 190641749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190641769) 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, 23779 + ... + 30768.

It is an arithmetic number, because the mean of its divisors is an integer number (19146348).

Almost surely, 2^190641765 is an apocalyptic number.

190641765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190641765 is a deficient number, since it is larger than the sum of its proper divisors (115699803).

190641765 is a wasteful number, since it uses less digits than its factorization.

190641765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54788.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 190641765 is about 13807.3083908487. The cubic root of 190641765 is about 575.5362508343.

The spelling of 190641765 in words is "one hundred ninety million, six hundred forty-one thousand, seven hundred sixty-five".