1516668473 has 4 divisors (see below), whose sum is σ = 1517642880. Its totient is φ = 1515694068.

The previous prime is 1516668457. The next prime is 1516668487. The reversal of 1516668473 is 3748666151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1516668473 - 2⁴ = 1516668457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1516668403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484865 + ... + 487982.

It is an arithmetic number, because the mean of its divisors is an integer number (379410720).

Almost surely, 2^1516668473 is an apocalyptic number.

It is an amenable number.

1516668473 is a deficient number, since it is larger than the sum of its proper divisors (974407).

1516668473 is an equidigital number, since it uses as much as digits as its factorization.

1516668473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974406.

The product of its digits is 725760, while the sum is 47.

The square root of 1516668473 is about 38944.4280096653. The cubic root of 1516668473 is about 1148.9387747469.

The spelling of 1516668473 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, four hundred seventy-three".