16393831956 has 18 divisors (see below), whose sum is σ = 41439964202. Its totient is φ = 5464610640.

The previous prime is 16393831931. The next prime is 16393831999. The reversal of 16393831956 is 65913839361.

It can be written as a sum of positive squares in only one way, i.e., 15740211600 + 653620356 = 125460^2 + 25566^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227692075 + ... + 227692146.

Almost surely, 2^16393831956 is an apocalyptic number.

It is an amenable number.

16393831956 is an abundant number, since it is smaller than the sum of its proper divisors (25046132246).

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

16393831956 is a wasteful number, since it uses less digits than its factorization.

16393831956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455384231 (or 455384226 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 16393831956 in words is "sixteen billion, three hundred ninety-three million, eight hundred thirty-one thousand, nine hundred fifty-six".