643058722088 has 8 divisors (see below), whose sum is σ = 1205735103930. Its totient is φ = 321529361040.

The previous prime is 643058722049. The next prime is 643058722099. The reversal of 643058722088 is 880227850346.

It can be written as a sum of positive squares in only one way, i.e., 573076252324 + 69982469764 = 757018^2 + 264542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40191170123 + ... + 40191170138.

Almost surely, 2^643058722088 is an apocalyptic number.

It is an amenable number.

643058722088 is a deficient number, since it is larger than the sum of its proper divisors (562676381842).

643058722088 is a wasteful number, since it uses less digits than its factorization.

643058722088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80382340267 (or 80382340263 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 643058722088 in words is "six hundred forty-three billion, fifty-eight million, seven hundred twenty-two thousand, eighty-eight".