1516516697 has 4 divisors (see below), whose sum is σ = 1518136116. Its totient is φ = 1514897280.

The previous prime is 1516516681. The next prime is 1516516699. The reversal of 1516516697 is 7966156151.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 598487296 + 918029401 = 24464^2 + 30299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1516516697 - 2⁴ = 1516516681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1516516699) 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, 808304 + ... + 810177.

It is an arithmetic number, because the mean of its divisors is an integer number (379534029).

Almost surely, 2^1516516697 is an apocalyptic number.

It is an amenable number.

1516516697 is a deficient number, since it is larger than the sum of its proper divisors (1619419).

1516516697 is an equidigital number, since it uses as much as digits as its factorization.

1516516697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619418.

The product of its digits is 340200, while the sum is 47.

The square root of 1516516697 is about 38942.4793381212. The cubic root of 1516516697 is about 1148.9004479467.

The spelling of 1516516697 in words is "one billion, five hundred sixteen million, five hundred sixteen thousand, six hundred ninety-seven".