1663994904594 has 32 divisors (see below), whose sum is σ = 3630580254720. Its totient is φ = 504234502800.

The previous prime is 1663994904571. The next prime is 1663994904613. The reversal of 1663994904594 is 4954094993661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9485127 + ... + 9658965.

It is an arithmetic number, because the mean of its divisors is an integer number (113455632960).

Almost surely, 2^{1663994904594} is an apocalyptic number.

1663994904594 is an abundant number, since it is smaller than the sum of its proper divisors (1966585350126).

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

1663994904594 is a wasteful number, since it uses less digits than its factorization.

1663994904594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318886.

The product of its (nonzero) digits is 226748160, while the sum is 69.

The spelling of 1663994904594 in words is "one trillion, six hundred sixty-three billion, nine hundred ninety-four million, nine hundred four thousand, five hundred ninety-four".