643251211107 has 8 divisors (see below), whose sum is σ = 875916542976. Its totient is φ = 419710009992.

The previous prime is 643251211091. The next prime is 643251211177. The reversal of 643251211107 is 701112152346.

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

It is not a de Polignac number, because 643251211107 - 2⁴ = 643251211091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643251211177) 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, 2281032523 + ... + 2281032804.

It is an arithmetic number, because the mean of its divisors is an integer number (109489567872).

Almost surely, 2^643251211107 is an apocalyptic number.

643251211107 is a deficient number, since it is larger than the sum of its proper divisors (232665331869).

643251211107 is a wasteful number, since it uses less digits than its factorization.

643251211107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562065377.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 643251211107 in words is "six hundred forty-three billion, two hundred fifty-one million, two hundred eleven thousand, one hundred seven".