10502818681 has 4 divisors (see below), whose sum is σ = 10522978164. Its totient is φ = 10482659200.

The previous prime is 10502818663. The next prime is 10502818687. The reversal of 10502818681 is 18681820501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2356131600 + 8146687081 = 48540^2 + 90259^2 .

It is a cyclic number.

It is not a de Polignac number, because 10502818681 - 2²⁵ = 10469264249 is a prime.

It is a super-2 number, since 2×10502818681² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10502818687) 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, 10078960 + ... + 10080001.

It is an arithmetic number, because the mean of its divisors is an integer number (2630744541).

Almost surely, 2^10502818681 is an apocalyptic number.

It is an amenable number.

10502818681 is a deficient number, since it is larger than the sum of its proper divisors (20159483).

10502818681 is an equidigital number, since it uses as much as digits as its factorization.

10502818681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20159482.

The product of its (nonzero) digits is 30720, while the sum is 40.

The spelling of 10502818681 in words is "ten billion, five hundred two million, eight hundred eighteen thousand, six hundred eighty-one".