643245480744 has 32 divisors (see below), whose sum is σ = 1630142661120. Its totient is φ = 211477965696.

The previous prime is 643245480737. The next prime is 643245480767. The reversal of 643245480744 is 447084542346.

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, 183572872 + ... + 183576375.

It is an arithmetic number, because the mean of its divisors is an integer number (50941958160).

Almost surely, 2^643245480744 is an apocalyptic number.

It is an amenable number.

643245480744 is an abundant number, since it is smaller than the sum of its proper divisors (986897180376).

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

643245480744 is a wasteful number, since it uses less digits than its factorization.

643245480744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367149329 (or 367149325 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 51.

The spelling of 643245480744 in words is "six hundred forty-three billion, two hundred forty-five million, four hundred eighty thousand, seven hundred forty-four".