10516721311667 has 4 divisors (see below), whose sum is σ = 10516879019640. Its totient is φ = 10516563603696.

The previous prime is 10516721311631. The next prime is 10516721311669. The reversal of 10516721311667 is 76611312761501.

10516721311667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 10516721311667 - 2¹² = 10516721307571 is a prime.

It is a super-2 number, since 2×10516721311667² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10516721311669) 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, 78753917 + ... + 78887342.

It is an arithmetic number, because the mean of its divisors is an integer number (2629219754910).

Almost surely, 2^{10516721311667} is an apocalyptic number.

10516721311667 is a deficient number, since it is larger than the sum of its proper divisors (157707973).

10516721311667 is an equidigital number, since it uses as much as digits as its factorization.

10516721311667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157707972.

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 10516721311667 in words is "ten trillion, five hundred sixteen billion, seven hundred twenty-one million, three hundred eleven thousand, six hundred sixty-seven".