1648866515 has 4 divisors (see below), whose sum is σ = 1978639824. Its totient is φ = 1319093208.

The previous prime is 1648866503. The next prime is 1648866529. The reversal of 1648866515 is 5156688461.

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

It is a cyclic number.

It is not a de Polignac number, because 1648866515 - 2³⁰ = 575124691 is a prime.

It is a Duffinian number.

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, 164886647 + ... + 164886656.

It is an arithmetic number, because the mean of its divisors is an integer number (494659956).

Almost surely, 2^1648866515 is an apocalyptic number.

1648866515 is a deficient number, since it is larger than the sum of its proper divisors (329773309).

1648866515 is an equidigital number, since it uses as much as digits as its factorization.

1648866515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329773308.

The product of its digits is 1382400, while the sum is 50.

The square root of 1648866515 is about 40606.2373903320. The cubic root of 1648866515 is about 1181.3951025432.

The spelling of 1648866515 in words is "one billion, six hundred forty-eight million, eight hundred sixty-six thousand, five hundred fifteen".