643063620426 has 16 divisors (see below), whose sum is σ = 1286897858400. Its totient is φ = 214226103888.

The previous prime is 643063620377. The next prime is 643063620533. The reversal of 643063620426 is 624026360346.

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, 32098216 + ... + 32118243.

It is an arithmetic number, because the mean of its divisors is an integer number (80431116150).

Almost surely, 2^643063620426 is an apocalyptic number.

643063620426 is an abundant number, since it is smaller than the sum of its proper divisors (643834237974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643063620426 is a wasteful number, since it uses less digits than its factorization.

643063620426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64218133.

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 643063620426 in words is "six hundred forty-three billion, sixty-three million, six hundred twenty thousand, four hundred twenty-six".