168440339516 has 12 divisors (see below), whose sum is σ = 294782492088. Its totient is φ = 84216770352.

The previous prime is 168440339497. The next prime is 168440339519. The reversal of 168440339516 is 615933044861.

It is a super-2 number, since 2×168440339516² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168440339519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736691 + ... + 937866.

It is an arithmetic number, because the mean of its divisors is an integer number (24565207674).

Almost surely, 2^168440339516 is an apocalyptic number.

It is an amenable number.

168440339516 is a deficient number, since it is larger than the sum of its proper divisors (126342152572).

168440339516 is a wasteful number, since it uses less digits than its factorization.

168440339516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699708 (or 1699706 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 168440339516 in words is "one hundred sixty-eight billion, four hundred forty million, three hundred thirty-nine thousand, five hundred sixteen".