643641545146346 has 8 divisors (see below), whose sum is σ = 981826085816640. Its totient is φ = 316366183207468.

The previous prime is 643641545146291. The next prime is 643641545146409.

643641545146346 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×643641545146346² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2727294682706 + ... + 2727294682941.

It is an arithmetic number, because the mean of its divisors is an integer number (122728260727080).

Almost surely, 2^{643641545146346} is an apocalyptic number.

643641545146346 is a deficient number, since it is larger than the sum of its proper divisors (338184540670294).

643641545146346 is a wasteful number, since it uses less digits than its factorization.

643641545146346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454589365708.

The product of its digits is 298598400, while the sum is 62.

The spelling of 643641545146346 in words is "six hundred forty-three trillion, six hundred forty-one billion, five hundred forty-five million, one hundred forty-six thousand, three hundred forty-six".