1613191994 has 16 divisors (see below), whose sum is σ = 2457967680. Its totient is φ = 793907520.

The previous prime is 1613191991. The next prime is 1613192011. The reversal of 1613191994 is 4991913161.

It is not an unprimeable number, because it can be changed into a prime (1613191991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78722 + ... + 97074.

It is an arithmetic number, because the mean of its divisors is an integer number (153622980).

Almost surely, 2^1613191994 is an apocalyptic number.

1613191994 is a deficient number, since it is larger than the sum of its proper divisors (844775686).

1613191994 is a wasteful number, since it uses less digits than its factorization.

1613191994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19045.

The product of its digits is 52488, while the sum is 44.

The square root of 1613191994 is about 40164.5614192412. The cubic root of 1613191994 is about 1172.8127698080.

The spelling of 1613191994 in words is "one billion, six hundred thirteen million, one hundred ninety-one thousand, nine hundred ninety-four".