623999438001 has 12 divisors (see below), whose sum is σ = 901340803012. Its totient is φ = 415995803136.

The previous prime is 623999437979. The next prime is 623999438089. The reversal of 623999438001 is 100834999326.

623999438001 is a `hidden beast` number, since 623 + 9 + 9 + 9 + 4 + 3 + 8 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 494140108401 + 129859329600 = 702951^2 + 360360^2 .

It is not a de Polignac number, because 623999438001 - 2³⁰ = 622925696177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623999438701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1004805 + ... + 1502541.

Almost surely, 2^623999438001 is an apocalyptic number.

It is an amenable number.

623999438001 is a deficient number, since it is larger than the sum of its proper divisors (277341365011).

623999438001 is a wasteful number, since it uses less digits than its factorization.

623999438001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637040 (or 637037 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 623999438001 in words is "six hundred twenty-three billion, nine hundred ninety-nine million, four hundred thirty-eight thousand, one".