721130860183 has 4 divisors (see below), whose sum is σ = 721133801208. Its totient is φ = 721127919160.

The previous prime is 721130860169. The next prime is 721130860187. The reversal of 721130860183 is 381068031127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721130860183 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 (721130860187) 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, 1065541 + ... + 1605502.

It is an arithmetic number, because the mean of its divisors is an integer number (180283450302).

Almost surely, 2^721130860183 is an apocalyptic number.

721130860183 is a deficient number, since it is larger than the sum of its proper divisors (2941025).

721130860183 is a wasteful number, since it uses less digits than its factorization.

721130860183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941024.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 721130860183 in words is "seven hundred twenty-one billion, one hundred thirty million, eight hundred sixty thousand, one hundred eighty-three".