1613791963 has 16 divisors (see below), whose sum is σ = 2005608384. Its totient is φ = 1266693120.

The previous prime is 1613791943. The next prime is 1613791969. The reversal of 1613791963 is 3691973161.

It is not a de Polignac number, because 1613791963 - 2²⁵ = 1580237531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1613791969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178858 + ... + 187663.

It is an arithmetic number, because the mean of its divisors is an integer number (125350524).

Almost surely, 2^1613791963 is an apocalyptic number.

1613791963 is a deficient number, since it is larger than the sum of its proper divisors (391816421).

1613791963 is a wasteful number, since it uses less digits than its factorization.

1613791963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366582.

The product of its digits is 183708, while the sum is 46.

The square root of 1613791963 is about 40172.0296101653. The cubic root of 1613791963 is about 1172.9581470255.

The spelling of 1613791963 in words is "one billion, six hundred thirteen million, seven hundred ninety-one thousand, nine hundred sixty-three".