623012654561 has 16 divisors (see below), whose sum is σ = 698077504320. Its totient is φ = 551021590080.

The previous prime is 623012654497. The next prime is 623012654603. The reversal of 623012654561 is 165456210326.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 623012654561 - 2⁶ = 623012654497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623012654861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5371595 + ... + 5486351.

It is an arithmetic number, because the mean of its divisors is an integer number (43629844020).

Almost surely, 2^623012654561 is an apocalyptic number.

It is an amenable number.

623012654561 is a deficient number, since it is larger than the sum of its proper divisors (75064849759).

623012654561 is a wasteful number, since it uses less digits than its factorization.

623012654561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128144.

The product of its (nonzero) digits is 259200, while the sum is 41.

Adding to 623012654561 its reverse (165456210326), we get a palindrome (788468864887).

The spelling of 623012654561 in words is "six hundred twenty-three billion, twelve million, six hundred fifty-four thousand, five hundred sixty-one".