123033556431655 has 4 divisors (see below), whose sum is σ = 147640267717992. Its totient is φ = 98426845145320.

The previous prime is 123033556431641. The next prime is 123033556431659. The reversal of 123033556431655 is 556134655330321.

It is a happy number.

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

It is not a de Polignac number, because 123033556431655 - 2⁵ = 123033556431623 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 (123033556431659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12303355643161 + ... + 12303355643170.

It is an arithmetic number, because the mean of its divisors is an integer number (36910066929498).

Almost surely, 2^{123033556431655} is an apocalyptic number.

123033556431655 is a deficient number, since it is larger than the sum of its proper divisors (24606711286337).

123033556431655 is an equidigital number, since it uses as much as digits as its factorization.

123033556431655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24606711286336.

The product of its (nonzero) digits is 14580000, while the sum is 52.

The spelling of 123033556431655 in words is "one hundred twenty-three trillion, thirty-three billion, five hundred fifty-six million, four hundred thirty-one thousand, six hundred fifty-five".