1693145904 has 20 divisors (see below), whose sum is σ = 4373960376. Its totient is φ = 564381952.

The previous prime is 1693145903. The next prime is 1693145911. The reversal of 1693145904 is 4095413961.

1693145904 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1693145903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17636889 + ... + 17636984.

Almost surely, 2^1693145904 is an apocalyptic number.

It is an amenable number.

1693145904 is an abundant number, since it is smaller than the sum of its proper divisors (2680814472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1693145904 is a wasteful number, since it uses less digits than its factorization.

1693145904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35273884 (or 35273878 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1693145904 is about 41147.8541846352. The cubic root of 1693145904 is about 1191.8770611765.

It can be divided in two parts, 16931 and 45904, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 1693145904 in words is "one billion, six hundred ninety-three million, one hundred forty-five thousand, nine hundred four".