1516668378 has 8 divisors (see below), whose sum is σ = 3033336768. Its totient is φ = 505556124.

The previous prime is 1516668359. The next prime is 1516668403. The reversal of 1516668378 is 8738666151.

It is a sphenic number, since it is the product of 3 distinct primes.

1516668378 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1516668378.

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, 126389026 + ... + 126389037.

It is an arithmetic number, because the mean of its divisors is an integer number (379167096).

Almost surely, 2^1516668378 is an apocalyptic number.

1516668378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1516668378 is a wasteful number, since it uses less digits than its factorization.

1516668378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252778068.

The product of its digits is 1451520, while the sum is 51.

The square root of 1516668378 is about 38944.4267899786. The cubic root of 1516668378 is about 1148.9387507581.

The spelling of 1516668378 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, three hundred seventy-eight".