16868439039 has 32 divisors (see below), whose sum is σ = 24852602880. Its totient is φ = 10129391712.

The previous prime is 16868439017. The next prime is 16868439061. The reversal of 16868439039 is 93093486861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16868439017) and next prime (16868439061).

It is not a de Polignac number, because 16868439039 - 2⁹ = 16868438527 is a prime.

It is a super-2 number, since 2×16868439039² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 16868439039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868435039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180414 + ... + 257460.

It is an arithmetic number, because the mean of its divisors is an integer number (776643840).

Almost surely, 2^16868439039 is an apocalyptic number.

16868439039 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16868439039 is a deficient number, since it is larger than the sum of its proper divisors (7984163841).

16868439039 is a wasteful number, since it uses less digits than its factorization.

16868439039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77259.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 16868439039 in words is "sixteen billion, eight hundred sixty-eight million, four hundred thirty-nine thousand, thirty-nine".