646819846 has 16 divisors (see below), whose sum is σ = 1035961344. Its totient is φ = 302153544.

The previous prime is 646819837. The next prime is 646819879. The reversal of 646819846 is 648918646.

It is a junction number, because it is equal to n+sod(n) for n = 646819793 and 646819802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161526 + ... + 165481.

It is an arithmetic number, because the mean of its divisors is an integer number (64747584).

Almost surely, 2^646819846 is an apocalyptic number.

646819846 is a deficient number, since it is larger than the sum of its proper divisors (389141498).

646819846 is a wasteful number, since it uses less digits than its factorization.

646819846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327075.

The product of its digits is 1990656, while the sum is 52.

The square root of 646819846 is about 25432.6531451203. The cubic root of 646819846 is about 864.8240906615.

The spelling of 646819846 in words is "six hundred forty-six million, eight hundred nineteen thousand, eight hundred forty-six".