1016921431683 has 32 divisors (see below), whose sum is σ = 1527686511680. Its totient is φ = 668442378240.

The previous prime is 1016921431667. The next prime is 1016921431711. The reversal of 1016921431683 is 3861341296101.

It is not a de Polignac number, because 1016921431683 - 2⁴ = 1016921431667 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016921431283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6068835 + ... + 6234147.

It is an arithmetic number, because the mean of its divisors is an integer number (47740203490).

Almost surely, 2^{1016921431683} is an apocalyptic number.

1016921431683 is a deficient number, since it is larger than the sum of its proper divisors (510765079997).

1016921431683 is a wasteful number, since it uses less digits than its factorization.

1016921431683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168516 (or 168510 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 1016921431683 in words is "one trillion, sixteen billion, nine hundred twenty-one million, four hundred thirty-one thousand, six hundred eighty-three".