646710221054534 has 16 divisors (see below), whose sum is σ = 1193926561947168. Its totient is φ = 255841406131392.

The previous prime is 646710221054531. The next prime is 646710221054543. The reversal of 646710221054534 is 435450122017646.

It is a super-2 number, since 2×646710221054534² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646710221054531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776676431287 + ... + 1776676431650.

It is an arithmetic number, because the mean of its divisors is an integer number (74620410121698).

Almost surely, 2^{646710221054534} is an apocalyptic number.

646710221054534 is a deficient number, since it is larger than the sum of its proper divisors (547216340892634).

646710221054534 is a wasteful number, since it uses less digits than its factorization.

646710221054534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553352862959.

The product of its (nonzero) digits is 4838400, while the sum is 50.

The spelling of 646710221054534 in words is "six hundred forty-six trillion, seven hundred ten billion, two hundred twenty-one million, fifty-four thousand, five hundred thirty-four".