1649377873912 has 32 divisors (see below), whose sum is σ = 3253634359920. Its totient is φ = 782829308160.

The previous prime is 1649377873907. The next prime is 1649377873919. The reversal of 1649377873912 is 2193787739461.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649377873919) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 67941798 + ... + 67966069.

Almost surely, 2^{1649377873912} is an apocalyptic number.

It is an amenable number.

1649377873912 is a deficient number, since it is larger than the sum of its proper divisors (1604256486008).

1649377873912 is a wasteful number, since it uses less digits than its factorization.

1649377873912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135907951 (or 135907947 counting only the distinct ones).

The product of its digits is 96018048, while the sum is 67.

The spelling of 1649377873912 in words is "one trillion, six hundred forty-nine billion, three hundred seventy-seven million, eight hundred seventy-three thousand, nine hundred twelve".