643608950026 has 8 divisors (see below), whose sum is σ = 1103329628640. Its totient is φ = 275832407148.

The previous prime is 643608950011. The next prime is 643608950027. The reversal of 643608950026 is 620059806346.

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

It is not an unprimeable number, because it can be changed into a prime (643608950027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22986033916 + ... + 22986033943.

It is an arithmetic number, because the mean of its divisors is an integer number (137916203580).

Almost surely, 2^643608950026 is an apocalyptic number.

643608950026 is a deficient number, since it is larger than the sum of its proper divisors (459720678614).

643608950026 is a wasteful number, since it uses less digits than its factorization.

643608950026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45972067868.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 643608950026 in words is "six hundred forty-three billion, six hundred eight million, nine hundred fifty thousand, twenty-six".