16768772865 has 24 divisors (see below), whose sum is σ = 31301710440. Its totient is φ = 8255395584.

The previous prime is 16768772837. The next prime is 16768772887. The reversal of 16768772865 is 56827786761.

It can be written as a sum of positive squares in 4 ways, for example, as 427496976 + 16341275889 = 20676^2 + 127833^2 .

It is not a de Polignac number, because 16768772865 - 2¹⁴ = 16768756481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14331700 + ... + 14332869.

It is an arithmetic number, because the mean of its divisors is an integer number (1304237935).

Almost surely, 2^16768772865 is an apocalyptic number.

16768772865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16768772865 is a deficient number, since it is larger than the sum of its proper divisors (14532937575).

16768772865 is a wasteful number, since it uses less digits than its factorization.

16768772865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28664593 (or 28664590 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 16768772865 in words is "sixteen billion, seven hundred sixty-eight million, seven hundred seventy-two thousand, eight hundred sixty-five".