1516668388 has 12 divisors (see below), whose sum is σ = 2793862960. Its totient is φ = 718421832.

The previous prime is 1516668359. The next prime is 1516668403. The reversal of 1516668388 is 8838666151.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9978006 + ... + 9978157.

Almost surely, 2^1516668388 is an apocalyptic number.

It is an amenable number.

1516668388 is a deficient number, since it is larger than the sum of its proper divisors (1277194572).

1516668388 is a wasteful number, since it uses less digits than its factorization.

1516668388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19956186 (or 19956184 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The square root of 1516668388 is about 38944.4269183666. The cubic root of 1516668388 is about 1148.9387532833.

The spelling of 1516668388 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, three hundred eighty-eight".