123315166455 has 32 divisors (see below), whose sum is σ = 212631315456. Its totient is φ = 60666205824.

The previous prime is 123315166439. The next prime is 123315166477. The reversal of 123315166455 is 554661513321.

It is a happy number.

It is not a de Polignac number, because 123315166455 - 2⁴ = 123315166439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55284 + ... + 499686.

It is an arithmetic number, because the mean of its divisors is an integer number (6644728608).

Almost surely, 2^123315166455 is an apocalyptic number.

123315166455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123315166455 is a deficient number, since it is larger than the sum of its proper divisors (89316149001).

123315166455 is a wasteful number, since it uses less digits than its factorization.

123315166455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445847.

The product of its digits is 324000, while the sum is 42.

Adding to 123315166455 its reverse (554661513321), we get a palindrome (677976679776).

The spelling of 123315166455 in words is "one hundred twenty-three billion, three hundred fifteen million, one hundred sixty-six thousand, four hundred fifty-five".