16731771664 has 10 divisors (see below), whose sum is σ = 32417807630. Its totient is φ = 8365885824.

The previous prime is 16731771649. The next prime is 16731771673. The reversal of 16731771664 is 46617713761.

It can be written as a sum of positive squares in only one way, i.e., 11879256064 + 4852515600 = 108992^2 + 69660^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522867849 + ... + 522867880.

It is an arithmetic number, because the mean of its divisors is an integer number (3241780763).

Almost surely, 2^16731771664 is an apocalyptic number.

It is an amenable number.

16731771664 is a deficient number, since it is larger than the sum of its proper divisors (15686035966).

16731771664 is a wasteful number, since it uses less digits than its factorization.

16731771664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045735737 (or 1045735731 counting only the distinct ones).

The product of its digits is 889056, while the sum is 49.

The spelling of 16731771664 in words is "sixteen billion, seven hundred thirty-one million, seven hundred seventy-one thousand, six hundred sixty-four".