1923664839653 has 2 divisors, whose sum is σ = 1923664839654. Its totient is φ = 1923664839652.

The previous prime is 1923664839647. The next prime is 1923664839659. The reversal of 1923664839653 is 3569384663291.

It is a balanced prime because it is at equal distance from previous prime (1923664839647) and next prime (1923664839659).

It can be written as a sum of positive squares in only one way, i.e., 1809019620004 + 114645219649 = 1344998^2 + 338593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1923664839653 - 2⁶ = 1923664839589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1923664839653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1923664839659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961832419826 + 961832419827.

It is an arithmetic number, because the mean of its divisors is an integer number (961832419827).

Almost surely, 2^{1923664839653} is an apocalyptic number.

It is an amenable number.

1923664839653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923664839653 is an equidigital number, since it uses as much as digits as its factorization.

1923664839653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151165440, while the sum is 65.

The spelling of 1923664839653 in words is "one trillion, nine hundred twenty-three billion, six hundred sixty-four million, eight hundred thirty-nine thousand, six hundred fifty-three".