643461346 has 16 divisors (see below), whose sum is σ = 1053414720. Its totient is φ = 292349680.

The previous prime is 643461289. The next prime is 643461383. The reversal of 643461346 is 643164346.

It is a super-2 number, since 2×643461346² = 828085007592263432, which contains 22 as substring.

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, 56115 + ... + 66601.

It is an arithmetic number, because the mean of its divisors is an integer number (65838420).

Almost surely, 2^643461346 is an apocalyptic number.

643461346 is a deficient number, since it is larger than the sum of its proper divisors (409953374).

643461346 is a wasteful number, since it uses less digits than its factorization.

643461346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13289.

The product of its digits is 124416, while the sum is 37.

The square root of 643461346 is about 25366.5398901782. The cubic root of 643461346 is about 863.3246760841.

The spelling of 643461346 in words is "six hundred forty-three million, four hundred sixty-one thousand, three hundred forty-six".