190551645 has 12 divisors (see below), whose sum is σ = 330289596. Its totient is φ = 101627520.

The previous prime is 190551631. The next prime is 190551661. The reversal of 190551645 is 546155091.

190551645 is a `hidden beast` number, since 1 + 9 + 0 + 5 + 5 + 1 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107868996 + 82682649 = 10386^2 + 9093^2 .

It is not a de Polignac number, because 190551645 - 2⁴ = 190551629 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 2117196 + ... + 2117285.

It is an arithmetic number, because the mean of its divisors is an integer number (27524133).

Almost surely, 2^190551645 is an apocalyptic number.

190551645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190551645 is a deficient number, since it is larger than the sum of its proper divisors (139737951).

190551645 is a wasteful number, since it uses less digits than its factorization.

190551645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234492 (or 4234489 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 190551645 is about 13804.0445160105. The cubic root of 190551645 is about 575.4455475511.

The spelling of 190551645 in words is "one hundred ninety million, five hundred fifty-one thousand, six hundred forty-five".