10721734691 has 2 divisors, whose sum is σ = 10721734692. Its totient is φ = 10721734690.

The previous prime is 10721734657. The next prime is 10721734753. The reversal of 10721734691 is 19643712701.

It is a weak prime.

It is an emirp because it is prime and its reverse (19643712701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10721734691 - 2¹⁰ = 10721733667 is a prime.

It is a super-2 number, since 2×10721734691² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10721734091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360867345 + 5360867346.

It is an arithmetic number, because the mean of its divisors is an integer number (5360867346).

Almost surely, 2^10721734691 is an apocalyptic number.

10721734691 is a deficient number, since it is larger than the sum of its proper divisors (1).

10721734691 is an equidigital number, since it uses as much as digits as its factorization.

10721734691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 10721734691 in words is "ten billion, seven hundred twenty-one million, seven hundred thirty-four thousand, six hundred ninety-one".