1639414894 has 16 divisors (see below), whose sum is σ = 2691702720. Its totient is φ = 744248160.

The previous prime is 1639414883. The next prime is 1639414913. The reversal of 1639414894 is 4984149361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515254 + ... + 518425.

It is an arithmetic number, because the mean of its divisors is an integer number (168231420).

Almost surely, 2^1639414894 is an apocalyptic number.

1639414894 is a deficient number, since it is larger than the sum of its proper divisors (1052287826).

1639414894 is a wasteful number, since it uses less digits than its factorization.

1639414894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033755.

The product of its digits is 746496, while the sum is 49.

The square root of 1639414894 is about 40489.6887367636. The cubic root of 1639414894 is about 1179.1334473851.

The spelling of 1639414894 in words is "one billion, six hundred thirty-nine million, four hundred fourteen thousand, eight hundred ninety-four".