1893145645 has 16 divisors (see below), whose sum is σ = 2283372288. Its totient is φ = 1506807360.

The previous prime is 1893145591. The next prime is 1893145669. The reversal of 1893145645 is 5465413981.

It is not a de Polignac number, because 1893145645 - 2²⁵ = 1859591213 is a prime.

It is a super-3 number, since 3×1893145645³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1893145595 and 1893145604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991782 + ... + 993688.

It is an arithmetic number, because the mean of its divisors is an integer number (142710768).

Almost surely, 2^1893145645 is an apocalyptic number.

It is an amenable number.

1893145645 is a deficient number, since it is larger than the sum of its proper divisors (390226643).

1893145645 is a wasteful number, since it uses less digits than its factorization.

1893145645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820.

The product of its digits is 518400, while the sum is 46.

The square root of 1893145645 is about 43510.2935522159. The cubic root of 1893145645 is about 1237.0711409912.

The spelling of 1893145645 in words is "one billion, eight hundred ninety-three million, one hundred forty-five thousand, six hundred forty-five".