123530432045555 has 4 divisors (see below), whose sum is σ = 148236518454672. Its totient is φ = 98824345636440.

The previous prime is 123530432045551. The next prime is 123530432045557. The reversal of 123530432045555 is 555540234035321.

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 123530432045555 - 2² = 123530432045551 is a prime.

It is a super-2 number, since 2×123530432045555² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123530432045551) 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, 12353043204551 + ... + 12353043204560.

It is an arithmetic number, because the mean of its divisors is an integer number (37059129613668).

Almost surely, 2^{123530432045555} is an apocalyptic number.

123530432045555 is a deficient number, since it is larger than the sum of its proper divisors (24706086409117).

123530432045555 is an equidigital number, since it uses as much as digits as its factorization.

123530432045555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24706086409116.

The product of its (nonzero) digits is 5400000, while the sum is 47.

The spelling of 123530432045555 in words is "one hundred twenty-three trillion, five hundred thirty billion, four hundred thirty-two million, forty-five thousand, five hundred fifty-five".