643377096 has 24 divisors (see below), whose sum is σ = 1742479830. Its totient is φ = 214459008.

The previous prime is 643377089. The next prime is 643377101. The reversal of 643377096 is 690773346.

It can be written as a sum of positive squares in only one way, i.e., 618516900 + 24860196 = 24870^2 + 4986^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4467825 + ... + 4467968.

Almost surely, 2^643377096 is an apocalyptic number.

It is an amenable number.

643377096 is an abundant number, since it is smaller than the sum of its proper divisors (1099102734).

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

643377096 is a wasteful number, since it uses less digits than its factorization.

643377096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8935805 (or 8935798 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The square root of 643377096 is about 25364.8791836271. The cubic root of 643377096 is about 863.2869953547.

The spelling of 643377096 in words is "six hundred forty-three million, three hundred seventy-seven thousand, ninety-six".