643775748214 has 8 divisors (see below), whose sum is σ = 965667590640. Its totient is φ = 321886551336.

The previous prime is 643775748107. The next prime is 643775748221. The reversal of 643775748214 is 412847577346.

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

It is a congruent number.

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, 142287 + ... + 1143589.

It is an arithmetic number, because the mean of its divisors is an integer number (120708448830).

Almost surely, 2^643775748214 is an apocalyptic number.

643775748214 is a deficient number, since it is larger than the sum of its proper divisors (321891842426).

643775748214 is a wasteful number, since it uses less digits than its factorization.

643775748214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322774.

The product of its digits is 31610880, while the sum is 58.

The spelling of 643775748214 in words is "six hundred forty-three billion, seven hundred seventy-five million, seven hundred forty-eight thousand, two hundred fourteen".