16785915764 has 12 divisors (see below), whose sum is σ = 29387917188. Its totient is φ = 8389368000.

The previous prime is 16785915709. The next prime is 16785915793. The reversal of 16785915764 is 46751958761.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11436163600 + 5349752164 = 106940^2 + 73142^2 .

It is a super-2 number, since 2×16785915764² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886937 + ... + 905664.

It is an arithmetic number, because the mean of its divisors is an integer number (2448993099).

Almost surely, 2^16785915764 is an apocalyptic number.

It is an amenable number.

16785915764 is a deficient number, since it is larger than the sum of its proper divisors (12602001424).

16785915764 is a wasteful number, since it uses less digits than its factorization.

16785915764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794946 (or 1794944 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 59.

The spelling of 16785915764 in words is "sixteen billion, seven hundred eighty-five million, nine hundred fifteen thousand, seven hundred sixty-four".