550400120123 has 16 divisors (see below), whose sum is σ = 650754908160. Its totient is φ = 455478660000.

The previous prime is 550400120117. The next prime is 550400120141. The reversal of 550400120123 is 321021004055.

It is not a de Polignac number, because 550400120123 - 2⁴ = 550400120107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550400120113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4278998 + ... + 4405748.

It is an arithmetic number, because the mean of its divisors is an integer number (40672181760).

Almost surely, 2^550400120123 is an apocalyptic number.

550400120123 is a deficient number, since it is larger than the sum of its proper divisors (100354788037).

550400120123 is a wasteful number, since it uses less digits than its factorization.

550400120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148178.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 550400120123 its reverse (321021004055), we get a palindrome (871421124178).

The spelling of 550400120123 in words is "five hundred fifty billion, four hundred million, one hundred twenty thousand, one hundred twenty-three".