646973586623 has 16 divisors (see below), whose sum is σ = 796445454336. Its totient is φ = 511781729760.

The previous prime is 646973586593. The next prime is 646973586629. The reversal of 646973586623 is 326685379646.

It is not a de Polignac number, because 646973586623 - 2⁸ = 646973586367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646973586623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646973586629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330911 + ... + 1184672.

It is an arithmetic number, because the mean of its divisors is an integer number (49777840896).

Almost surely, 2^646973586623 is an apocalyptic number.

646973586623 is a deficient number, since it is larger than the sum of its proper divisors (149471867713).

646973586623 is a wasteful number, since it uses less digits than its factorization.

646973586623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520294.

The product of its digits is 235146240, while the sum is 65.

The spelling of 646973586623 in words is "six hundred forty-six billion, nine hundred seventy-three million, five hundred eighty-six thousand, six hundred twenty-three".