1516668885 has 12 divisors (see below), whose sum is σ = 2628892812. Its totient is φ = 808890048.

The previous prime is 1516668869. The next prime is 1516668911. The reversal of 1516668885 is 5888666151.

It can be written as a sum of positive squares in 2 ways, for example, as 738426276 + 778242609 = 27174^2 + 27897^2 .

It is not a de Polignac number, because 1516668885 - 2⁴ = 1516668869 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16851832 + ... + 16851921.

It is an arithmetic number, because the mean of its divisors is an integer number (219074401).

Almost surely, 2^1516668885 is an apocalyptic number.

1516668885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1516668885 is a deficient number, since it is larger than the sum of its proper divisors (1112223927).

1516668885 is a wasteful number, since it uses less digits than its factorization.

1516668885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33703764 (or 33703761 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The square root of 1516668885 is about 38944.4332992534. The cubic root of 1516668885 is about 1148.9388787826.

The spelling of 1516668885 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, eight hundred eighty-five".