32730743621 has 4 divisors (see below), whose sum is σ = 32736125100. Its totient is φ = 32725362144.

The previous prime is 32730743543. The next prime is 32730743629. The reversal of 32730743621 is 12634703723.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8841640900 + 23889102721 = 94030^2 + 154561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32730743621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32730743629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681606 + ... + 2693783.

It is an arithmetic number, because the mean of its divisors is an integer number (8184031275).

Almost surely, 2^32730743621 is an apocalyptic number.

It is an amenable number.

32730743621 is a deficient number, since it is larger than the sum of its proper divisors (5381479).

32730743621 is an equidigital number, since it uses as much as digits as its factorization.

32730743621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381478.

The product of its (nonzero) digits is 127008, while the sum is 38.

The spelling of 32730743621 in words is "thirty-two billion, seven hundred thirty million, seven hundred forty-three thousand, six hundred twenty-one".