646211543016403 has 32 divisors (see below), whose sum is σ = 811994044925952. Its totient is φ = 500619631075200.

The previous prime is 646211543016383. The next prime is 646211543016451. The reversal of 646211543016403 is 304610345112646.

It is not a de Polignac number, because 646211543016403 - 2²⁹ = 646211006145491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646211543016203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134073243 + ... + 138809428.

It is an arithmetic number, because the mean of its divisors is an integer number (25374813903936).

Almost surely, 2^{646211543016403} is an apocalyptic number.

646211543016403 is a deficient number, since it is larger than the sum of its proper divisors (165782501909549).

646211543016403 is a wasteful number, since it uses less digits than its factorization.

646211543016403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272883235.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 646211543016403 in words is "six hundred forty-six trillion, two hundred eleven billion, five hundred forty-three million, sixteen thousand, four hundred three".