190894311645 has 64 divisors (see below), whose sum is σ = 317229696000. Its totient is φ = 97961610240.

The previous prime is 190894311623. The next prime is 190894311689. The reversal of 190894311645 is 546113498091.

It is a happy number.

It is not a de Polignac number, because 190894311645 - 2⁶ = 190894311581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16919116 + ... + 16930394.

It is an arithmetic number, because the mean of its divisors is an integer number (4956714000).

Almost surely, 2^190894311645 is an apocalyptic number.

190894311645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190894311645 is a deficient number, since it is larger than the sum of its proper divisors (126335384355).

190894311645 is a wasteful number, since it uses less digits than its factorization.

190894311645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11750.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 190894311645 in words is "one hundred ninety billion, eight hundred ninety-four million, three hundred eleven thousand, six hundred forty-five".