2190767645 has 64 divisors (see below), whose sum is σ = 3120353280. Its totient is φ = 1458816000.

The previous prime is 2190767639. The next prime is 2190767651. The reversal of 2190767645 is 5467670912.

It is an interprime number because it is at equal distance from previous prime (2190767639) and next prime (2190767651).

It is not a de Polignac number, because 2190767645 - 2⁴ = 2190767629 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2190767645.

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, 8329784 + ... + 8330046.

It is an arithmetic number, because the mean of its divisors is an integer number (48755520).

Almost surely, 2^2190767645 is an apocalyptic number.

It is an amenable number.

2190767645 is a deficient number, since it is larger than the sum of its proper divisors (929585635).

2190767645 is a wasteful number, since it uses less digits than its factorization.

2190767645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 2190767645 is about 46805.6368934341. The cubic root of 2190767645 is about 1298.7695744516.

The spelling of 2190767645 in words is "two billion, one hundred ninety million, seven hundred sixty-seven thousand, six hundred forty-five".