255773823221631 has 16 divisors (see below), whose sum is σ = 400652702110080. Its totient is φ = 143090250753120.

The previous prime is 255773823221617. The next prime is 255773823221681. The reversal of 255773823221631 is 136122328377552.

It is a happy number.

It is not a de Polignac number, because 255773823221631 - 2⁷ = 255773823221503 is a prime.

It is a super-2 number, since 2×255773823221631² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255773823221681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298104688641 + ... + 298104689498.

It is an arithmetic number, because the mean of its divisors is an integer number (25040793881880).

Almost surely, 2^{255773823221631} is an apocalyptic number.

255773823221631 is a deficient number, since it is larger than the sum of its proper divisors (144878878888449).

255773823221631 is a wasteful number, since it uses less digits than its factorization.

255773823221631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596209378166.

The product of its digits is 25401600, while the sum is 57.

The spelling of 255773823221631 in words is "two hundred fifty-five trillion, seven hundred seventy-three billion, eight hundred twenty-three million, two hundred twenty-one thousand, six hundred thirty-one".