190805372345990 has 32 divisors (see below), whose sum is σ = 361526690257920. Its totient is φ = 72305049410784.

The previous prime is 190805372345923. The next prime is 190805372345999. The reversal of 190805372345990 is 99543273508091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190805372345999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187120907 + ... + 188137833.

It is an arithmetic number, because the mean of its divisors is an integer number (11297709070560).

Almost surely, 2^{190805372345990} is an apocalyptic number.

190805372345990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190805372345990 is a deficient number, since it is larger than the sum of its proper divisors (170721317911930).

190805372345990 is a wasteful number, since it uses less digits than its factorization.

190805372345990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004476.

The product of its (nonzero) digits is 73483200, while the sum is 65.

The spelling of 190805372345990 in words is "one hundred ninety trillion, eight hundred five billion, three hundred seventy-two million, three hundred forty-five thousand, nine hundred ninety".