123438361550770 has 96 divisors (see below), whose sum is σ = 267246339365376. Its totient is φ = 40888356768000.

The previous prime is 123438361550731. The next prime is 123438361550771. The reversal of 123438361550770 is 77055163834321.

It is a super-2 number, since 2×123438361550770² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123438361550771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2368549 + ... + 15889831.

It is an arithmetic number, because the mean of its divisors is an integer number (2783816035056).

Almost surely, 2^{123438361550770} is an apocalyptic number.

123438361550770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123438361550770 is an abundant number, since it is smaller than the sum of its proper divisors (143807977814606).

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

123438361550770 is a wasteful number, since it uses less digits than its factorization.

123438361550770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13521936 (or 13521929 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 123438361550770 in words is "one hundred twenty-three trillion, four hundred thirty-eight billion, three hundred sixty-one million, five hundred fifty thousand, seven hundred seventy".