823623786678653 has 12 divisors (see below), whose sum is σ = 841764511245504. Its totient is φ = 805824798706200.

The previous prime is 823623786678619. The next prime is 823623786678673. The reversal of 823623786678653 is 356876687326328.

It is not a de Polignac number, because 823623786678653 - 2⁸ = 823623786678397 is a prime.

It is a super-2 number, since 2×823623786678653² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823623786678673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 622946501 + ... + 624267242.

It is an arithmetic number, because the mean of its divisors is an integer number (70147042603792).

Almost surely, 2^{823623786678653} is an apocalyptic number.

It is an amenable number.

823623786678653 is a deficient number, since it is larger than the sum of its proper divisors (18140724566851).

823623786678653 is a wasteful number, since it uses less digits than its factorization.

823623786678653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247214016 (or 1247213945 counting only the distinct ones).

The product of its digits is 17557585920, while the sum is 80.

The spelling of 823623786678653 in words is "eight hundred twenty-three trillion, six hundred twenty-three billion, seven hundred eighty-six million, six hundred seventy-eight thousand, six hundred fifty-three".