10645612063861 has 2 divisors, whose sum is σ = 10645612063862. Its totient is φ = 10645612063860.

The previous prime is 10645612063837. The next prime is 10645612063909. The reversal of 10645612063861 is 16836021654601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10566822942225 + 78789121636 = 3250665^2 + 280694^2 .

It is a cyclic number.

It is not a de Polignac number, because 10645612063861 - 2²⁵ = 10645578509429 is a prime.

It is a super-2 number, since 2×10645612063861² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10645612060861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5322806031930 + 5322806031931.

It is an arithmetic number, because the mean of its divisors is an integer number (5322806031931).

Almost surely, 2^{10645612063861} is an apocalyptic number.

It is an amenable number.

10645612063861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10645612063861 is an equidigital number, since it uses as much as digits as its factorization.

10645612063861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 10645612063861 in words is "ten trillion, six hundred forty-five billion, six hundred twelve million, sixty-three thousand, eight hundred sixty-one".