623646133623 has 40 divisors (see below), whose sum is σ = 980749953920. Its totient is φ = 393842483280.

The previous prime is 623646133597. The next prime is 623646133709. The reversal of 623646133623 is 326331646326.

623646133623 is a `hidden beast` number, since 6 + 2 + 3 + 6 + 4 + 6 + 13 + 3 + 623 = 666.

623646133623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 623646133623 - 2⁸ = 623646133367 is a prime.

It is a super-2 number, since 2×623646133623² (a number of 24 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 (623646133723) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28348158 + ... + 28370148.

It is an arithmetic number, because the mean of its divisors is an integer number (24518748848).

Almost surely, 2^623646133623 is an apocalyptic number.

623646133623 is a deficient number, since it is larger than the sum of its proper divisors (357103820297).

623646133623 is a wasteful number, since it uses less digits than its factorization.

623646133623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40449 (or 40440 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 45.

Adding to 623646133623 its reverse (326331646326), we get a palindrome (949977779949).

The spelling of 623646133623 in words is "six hundred twenty-three billion, six hundred forty-six million, one hundred thirty-three thousand, six hundred twenty-three".