1516668361 has 12 divisors (see below), whose sum is σ = 1698946380. Its totient is φ = 1351721280.

The previous prime is 1516668359. The next prime is 1516668403. The reversal of 1516668361 is 1638666151.

It can be written as a sum of positive squares in 6 ways, for example, as 127690000 + 1388978361 = 11300^2 + 37269^2 .

It is not a de Polignac number, because 1516668361 - 2¹ = 1516668359 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 149830 + ... + 159631.

It is an arithmetic number, because the mean of its divisors is an integer number (141578865).

Almost surely, 2^1516668361 is an apocalyptic number.

It is an amenable number.

1516668361 is a deficient number, since it is larger than the sum of its proper divisors (182278019).

1516668361 is a wasteful number, since it uses less digits than its factorization.

1516668361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309516 (or 309503 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 1516668361 is about 38944.4265717188. The cubic root of 1516668361 is about 1148.9387464654.

The spelling of 1516668361 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, three hundred sixty-one".