10721734673 has 6 divisors (see below), whose sum is σ = 11609925894. Its totient is φ = 9896985696.

The previous prime is 10721734657. The next prime is 10721734691. The reversal of 10721734673 is 37643712701.

It can be written as a sum of positive squares in 3 ways, for example, as 327320464 + 10394414209 = 18092^2 + 101953^2 .

It is not a de Polignac number, because 10721734673 - 2⁴ = 10721734657 is a prime.

It is a super-2 number, since 2×10721734673² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10721734673.

It is not an unprimeable number, because it can be changed into a prime (10721734603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31720940 + ... + 31721277.

It is an arithmetic number, because the mean of its divisors is an integer number (1934987649).

Almost surely, 2^10721734673 is an apocalyptic number.

10721734673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

10721734673 is a deficient number, since it is larger than the sum of its proper divisors (888191221).

10721734673 is an equidigital number, since it uses as much as digits as its factorization.

10721734673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63442243 (or 63442230 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 41.

The spelling of 10721734673 in words is "ten billion, seven hundred twenty-one million, seven hundred thirty-four thousand, six hundred seventy-three".