721543043233010 has 16 divisors (see below), whose sum is σ = 1299210259438872. Its totient is φ = 288521043600000.

The previous prime is 721543043233009. The next prime is 721543043233013. The reversal of 721543043233010 is 10332340345127.

It can be written as a sum of positive squares in 4 ways, for example, as 416230709403289 + 305312333829721 = 20401733^2 + 17473189^2 .

It is not an unprimeable number, because it can be changed into a prime (721543043233013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12021680141 + ... + 12021740160.

Almost surely, 2^{721543043233010} is an apocalyptic number.

721543043233010 is a deficient number, since it is larger than the sum of its proper divisors (577667216205862).

721543043233010 is a wasteful number, since it uses less digits than its factorization.

721543043233010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24043423309.

The product of its (nonzero) digits is 181440, while the sum is 38.

Adding to 721543043233010 its reverse (10332340345127), we get a palindrome (731875383578137).

The spelling of 721543043233010 in words is "seven hundred twenty-one trillion, five hundred forty-three billion, forty-three million, two hundred thirty-three thousand, ten".