123361778396 has 12 divisors (see below), whose sum is σ = 219422180040. Its totient is φ = 60669726960.

The previous prime is 123361778389. The next prime is 123361778399. The reversal of 123361778396 is 693877163321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123361778399) 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 3 ways as a sum of consecutive naturals, for example, 252790286 + ... + 252790773.

It is an arithmetic number, because the mean of its divisors is an integer number (18285181670).

Almost surely, 2^123361778396 is an apocalyptic number.

It is an amenable number.

123361778396 is a deficient number, since it is larger than the sum of its proper divisors (96060401644).

123361778396 is a wasteful number, since it uses less digits than its factorization.

123361778396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505581124 (or 505581122 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 56.

The spelling of 123361778396 in words is "one hundred twenty-three billion, three hundred sixty-one million, seven hundred seventy-eight thousand, three hundred ninety-six".