1516309818 has 32 divisors (see below), whose sum is σ = 3089534400. Its totient is φ = 495989760.

The previous prime is 1516309813. The next prime is 1516309829. The reversal of 1516309818 is 8189036151.

It is a self number, because there is not a number n which added to its sum of digits gives 1516309818.

It is not an unprimeable number, because it can be changed into a prime (1516309813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159721 + ... + 168947.

It is an arithmetic number, because the mean of its divisors is an integer number (96547950).

Almost surely, 2^1516309818 is an apocalyptic number.

1516309818 is an abundant number, since it is smaller than the sum of its proper divisors (1573224582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1516309818 is a wasteful number, since it uses less digits than its factorization.

1516309818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1516309818 is about 38939.8230350370. The cubic root of 1516309818 is about 1148.8482023005.

The spelling of 1516309818 in words is "one billion, five hundred sixteen million, three hundred nine thousand, eight hundred eighteen".