16798040865 has 24 divisors (see below), whose sum is σ = 29144442600. Its totient is φ = 8950389504.

The previous prime is 16798040849. The next prime is 16798040899. The reversal of 16798040865 is 56804089761.

It can be written as a sum of positive squares in 4 ways, for example, as 4466382561 + 12331658304 = 66831^2 + 111048^2 .

It is not a de Polignac number, because 16798040865 - 2⁴ = 16798040849 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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, 130722 + ... + 225131.

It is an arithmetic number, because the mean of its divisors is an integer number (1214351775).

Almost surely, 2^16798040865 is an apocalyptic number.

16798040865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16798040865 is a deficient number, since it is larger than the sum of its proper divisors (12346401735).

16798040865 is a wasteful number, since it uses less digits than its factorization.

16798040865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356913 (or 356910 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 16798040865 in words is "sixteen billion, seven hundred ninety-eight million, forty thousand, eight hundred sixty-five".