643242146630 has 16 divisors (see below), whose sum is σ = 1163897835264. Its totient is φ = 255949753920.

The previous prime is 643242146567. The next prime is 643242146641. The reversal of 643242146630 is 36641242346.

It is a congruent number.

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, 168386087 + ... + 168389906.

It is an arithmetic number, because the mean of its divisors is an integer number (72743614704).

Almost surely, 2^643242146630 is an apocalyptic number.

643242146630 is a deficient number, since it is larger than the sum of its proper divisors (520655688634).

643242146630 is a wasteful number, since it uses less digits than its factorization.

643242146630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336776191.

The product of its (nonzero) digits is 497664, while the sum is 41.

Adding to 643242146630 its reverse (36641242346), we get a palindrome (679883388976).

The spelling of 643242146630 in words is "six hundred forty-three billion, two hundred forty-two million, one hundred forty-six thousand, six hundred thirty".