123237805555 has 4 divisors (see below), whose sum is σ = 147885366672. Its totient is φ = 98590244440.

The previous prime is 123237805553. The next prime is 123237805571. The reversal of 123237805555 is 555508732321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123237805555 - 2¹ = 123237805553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123237805553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12323780551 + ... + 12323780560.

It is an arithmetic number, because the mean of its divisors is an integer number (36971341668).

Almost surely, 2^123237805555 is an apocalyptic number.

123237805555 is a deficient number, since it is larger than the sum of its proper divisors (24647561117).

123237805555 is an equidigital number, since it uses as much as digits as its factorization.

123237805555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24647561116.

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 123237805555 in words is "one hundred twenty-three billion, two hundred thirty-seven million, eight hundred five thousand, five hundred fifty-five".