10516426681 has 4 divisors (see below), whose sum is σ = 10546218612. Its totient is φ = 10486634752.

The previous prime is 10516426667. The next prime is 10516426741. The reversal of 10516426681 is 18662461501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18662461501 = 17 ⋅1097791853.

It can be written as a sum of positive squares in 2 ways, for example, as 7440615081 + 3075811600 = 86259^2 + 55460^2 .

It is a cyclic number.

It is not a de Polignac number, because 10516426681 - 2⁵ = 10516426649 is a prime.

It is a super-2 number, since 2×10516426681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10516426631) 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, 14895436 + ... + 14896141.

It is an arithmetic number, because the mean of its divisors is an integer number (2636554653).

Almost surely, 2^10516426681 is an apocalyptic number.

It is an amenable number.

10516426681 is a deficient number, since it is larger than the sum of its proper divisors (29791931).

10516426681 is an equidigital number, since it uses as much as digits as its factorization.

10516426681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29791930.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 10516426681 in words is "ten billion, five hundred sixteen million, four hundred twenty-six thousand, six hundred eighty-one".