123450501055 has 16 divisors (see below), whose sum is σ = 173240838144. Its totient is φ = 82683125280.

The previous prime is 123450501049. The next prime is 123450501091. The reversal of 123450501055 is 550105054321.

It is not a de Polignac number, because 123450501055 - 2⁵ = 123450501023 is a prime.

It is a super-2 number, since 2×123450501055² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 41011951 + ... + 41014960.

It is an arithmetic number, because the mean of its divisors is an integer number (10827552384).

Almost surely, 2^123450501055 is an apocalyptic number.

123450501055 is a deficient number, since it is larger than the sum of its proper divisors (49790337089).

123450501055 is an equidigital number, since it uses as much as digits as its factorization.

123450501055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82026966.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 123450501055 its reverse (550105054321), we get a palindrome (673555555376).

The spelling of 123450501055 in words is "one hundred twenty-three billion, four hundred fifty million, five hundred one thousand, fifty-five".