123205554055 has 16 divisors (see below), whose sum is σ = 155650492800. Its totient is φ = 93363386400.

The previous prime is 123205554007. The next prime is 123205554077. The reversal of 123205554055 is 550455502321.

It is not a de Polignac number, because 123205554055 - 2²¹ = 123203456903 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595980 + ... + 775630.

It is an arithmetic number, because the mean of its divisors is an integer number (9728155800).

Almost surely, 2^123205554055 is an apocalyptic number.

123205554055 is a deficient number, since it is larger than the sum of its proper divisors (32444938745).

123205554055 is a wasteful number, since it uses less digits than its factorization.

123205554055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186894.

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 123205554055 in words is "one hundred twenty-three billion, two hundred five million, five hundred fifty-four thousand, fifty-five".