1916806647 has 24 divisors (see below), whose sum is σ = 2974659456. Its totient is φ = 1094709168.

The previous prime is 1916806613. The next prime is 1916806669. The reversal of 1916806647 is 7466086191.

It is a happy number.

It is not a de Polignac number, because 1916806647 - 2⁸ = 1916806391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1916806596 and 1916806605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916806607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484158 + ... + 488100.

It is an arithmetic number, because the mean of its divisors is an integer number (123944144).

Almost surely, 2^1916806647 is an apocalyptic number.

1916806647 is a deficient number, since it is larger than the sum of its proper divisors (1057852809).

1916806647 is a wasteful number, since it uses less digits than its factorization.

1916806647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267 (or 7260 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1916806647 is about 43781.3504474222. The cubic root of 1916806647 is about 1242.2035581887.

The spelling of 1916806647 in words is "one billion, nine hundred sixteen million, eight hundred six thousand, six hundred forty-seven".