643231412075 has 36 divisors (see below), whose sum is σ = 947569610592. Its totient is φ = 431688398400.

The previous prime is 643231412071. The next prime is 643231412099. The reversal of 643231412075 is 570214132346.

It is not a de Polignac number, because 643231412075 - 2² = 643231412071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643231412071) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5528456 + ... + 5643605.

It is an arithmetic number, because the mean of its divisors is an integer number (26321378072).

Almost surely, 2^643231412075 is an apocalyptic number.

643231412075 is a deficient number, since it is larger than the sum of its proper divisors (304338198517).

643231412075 is a wasteful number, since it uses less digits than its factorization.

643231412075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172132 (or 11172120 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 643231412075 in words is "six hundred forty-three billion, two hundred thirty-one million, four hundred twelve thousand, seventy-five".