123655603312146 has 16 divisors (see below), whose sum is σ = 249712286301504. Its totient is φ = 40818354491184.

The previous prime is 123655603312141. The next prime is 123655603312151. The reversal of 123655603312146 is 641213306556321.

It is an interprime number because it is at equal distance from previous prime (123655603312141) and next prime (123655603312151).

It is a super-2 number, since 2×123655603312146² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123655603312095 and 123655603312104.

It is not an unprimeable number, because it can be changed into a prime (123655603312141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100044985881 + ... + 100044987116.

It is an arithmetic number, because the mean of its divisors is an integer number (15607017893844).

Almost surely, 2^{123655603312146} is an apocalyptic number.

123655603312146 is an abundant number, since it is smaller than the sum of its proper divisors (126056682989358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123655603312146 is a wasteful number, since it uses less digits than its factorization.

123655603312146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200089973105.

The product of its (nonzero) digits is 2332800, while the sum is 48.

Adding to 123655603312146 its reverse (641213306556321), we get a palindrome (764868909868467).

The spelling of 123655603312146 in words is "one hundred twenty-three trillion, six hundred fifty-five billion, six hundred three million, three hundred twelve thousand, one hundred forty-six".