190390381645 has 8 divisors (see below), whose sum is σ = 234040859640. Its totient is φ = 148597370880.

The previous prime is 190390381631. The next prime is 190390381651. The reversal of 190390381645 is 546183093091.

It can be written as a sum of positive squares in 4 ways, for example, as 170537481 + 190219844164 = 13059^2 + 436142^2 .

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

It is not a de Polignac number, because 190390381645 - 2⁹ = 190390381133 is a prime.

It is a super-3 number, since 3×190390381645³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 464366580 + ... + 464366989.

It is an arithmetic number, because the mean of its divisors is an integer number (29255107455).

Almost surely, 2^190390381645 is an apocalyptic number.

It is an amenable number.

190390381645 is a deficient number, since it is larger than the sum of its proper divisors (43650477995).

190390381645 is an equidigital number, since it uses as much as digits as its factorization.

190390381645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928733615.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 190390381645 in words is "one hundred ninety billion, three hundred ninety million, three hundred eighty-one thousand, six hundred forty-five".