1516668309 has 24 divisors (see below), whose sum is σ = 2361081632. Its totient is φ = 932614560.

The previous prime is 1516668301. The next prime is 1516668319. The reversal of 1516668309 is 9038666151.

It is not a de Polignac number, because 1516668309 - 2³ = 1516668301 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516668301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174894 + ... + 183360.

Almost surely, 2^1516668309 is an apocalyptic number.

It is an amenable number.

1516668309 is a deficient number, since it is larger than the sum of its proper divisors (844413323).

1516668309 is a wasteful number, since it uses less digits than its factorization.

1516668309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10017 (or 10014 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1516668309 is about 38944.4259041008. The cubic root of 1516668309 is about 1148.9387333347.

The spelling of 1516668309 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, three hundred nine".