123344777653 has 2 divisors, whose sum is σ = 123344777654. Its totient is φ = 123344777652.

The previous prime is 123344777623. The next prime is 123344777819. The reversal of 123344777653 is 356777443321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68299640964 + 55045136689 = 261342^2 + 234617^2 .

It is a cyclic number.

It is not a de Polignac number, because 123344777653 - 2²⁵ = 123311223221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123344777653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123344777623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61672388826 + 61672388827.

It is an arithmetic number, because the mean of its divisors is an integer number (61672388827).

Almost surely, 2^123344777653 is an apocalyptic number.

It is an amenable number.

123344777653 is a deficient number, since it is larger than the sum of its proper divisors (1).

123344777653 is an equidigital number, since it uses as much as digits as its factorization.

123344777653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 52.

The spelling of 123344777653 in words is "one hundred twenty-three billion, three hundred forty-four million, seven hundred seventy-seven thousand, six hundred fifty-three".