643476106 has 64 divisors (see below), whose sum is σ = 1245984768. Its totient is φ = 242244288.

The previous prime is 643476073. The next prime is 643476143. The reversal of 643476106 is 601674346.

It is a super-2 number, since 2×643476106² = 828122997985846472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1452321 + ... + 1452763.

It is an arithmetic number, because the mean of its divisors is an integer number (19468512).

Almost surely, 2^643476106 is an apocalyptic number.

643476106 is a deficient number, since it is larger than the sum of its proper divisors (602508662).

643476106 is a wasteful number, since it uses less digits than its factorization.

643476106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 643476106 is about 25366.8308229467. The cubic root of 643476106 is about 863.3312771410.

The spelling of 643476106 in words is "six hundred forty-three million, four hundred seventy-six thousand, one hundred six".