1631894787994 has 16 divisors (see below), whose sum is σ = 2547092314368. Its totient is φ = 783519133072.

The previous prime is 1631894787967. The next prime is 1631894787997. The reversal of 1631894787994 is 4997874981361.

It is a self number, because there is not a number n which added to its sum of digits gives 1631894787994.

It is not an unprimeable number, because it can be changed into a prime (1631894787997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163774102 + ... + 163784065.

It is an arithmetic number, because the mean of its divisors is an integer number (159193269648).

Almost surely, 2^{1631894787994} is an apocalyptic number.

1631894787994 is a deficient number, since it is larger than the sum of its proper divisors (915197526374).

1631894787994 is a wasteful number, since it uses less digits than its factorization.

1631894787994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327558269.

The product of its digits is 658409472, while the sum is 76.

The spelling of 1631894787994 in words is "one trillion, six hundred thirty-one billion, eight hundred ninety-four million, seven hundred eighty-seven thousand, nine hundred ninety-four".