1916806646 has 4 divisors (see below), whose sum is σ = 2875209972. Its totient is φ = 958403322.

The previous prime is 1916806613. The next prime is 1916806669. The reversal of 1916806646 is 6466086191.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1916806646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479201660 + ... + 479201663.

It is an arithmetic number, because the mean of its divisors is an integer number (718802493).

Almost surely, 2^1916806646 is an apocalyptic number.

1916806646 is a deficient number, since it is larger than the sum of its proper divisors (958403326).

1916806646 is an equidigital number, since it uses as much as digits as its factorization.

1916806646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958403325.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 1916806646 is about 43781.3504360019. The cubic root of 1916806646 is about 1242.2035579727.

The spelling of 1916806646 in words is "one billion, nine hundred sixteen million, eight hundred six thousand, six hundred forty-six".