255651761623 has 16 divisors (see below), whose sum is σ = 280242180000. Its totient is φ = 232135601152.

The previous prime is 255651761611. The next prime is 255651761639. The reversal of 255651761623 is 326167156552.

255651761623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 255651761623 - 2¹³ = 255651753431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255651761693) 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, 434328 + ... + 836626.

It is an arithmetic number, because the mean of its divisors is an integer number (17515136250).

Almost surely, 2^255651761623 is an apocalyptic number.

255651761623 is a deficient number, since it is larger than the sum of its proper divisors (24590418377).

255651761623 is a wasteful number, since it uses less digits than its factorization.

255651761623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403634.

The product of its digits is 2268000, while the sum is 49.

The spelling of 255651761623 in words is "two hundred fifty-five billion, six hundred fifty-one million, seven hundred sixty-one thousand, six hundred twenty-three".