10491812693 has 2 divisors, whose sum is σ = 10491812694. Its totient is φ = 10491812692.

The previous prime is 10491812621. The next prime is 10491812699. The reversal of 10491812693 is 39621819401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6796023844 + 3695788849 = 82438^2 + 60793^2 .

It is a cyclic number.

It is not a de Polignac number, because 10491812693 - 2¹² = 10491808597 is a prime.

It is a super-2 number, since 2×10491812693² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10491812699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5245906346 + 5245906347.

It is an arithmetic number, because the mean of its divisors is an integer number (5245906347).

Almost surely, 2^10491812693 is an apocalyptic number.

It is an amenable number.

10491812693 is a deficient number, since it is larger than the sum of its proper divisors (1).

10491812693 is an equidigital number, since it uses as much as digits as its factorization.

10491812693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 10491812693 in words is "ten billion, four hundred ninety-one million, eight hundred twelve thousand, six hundred ninety-three".