123778863708778 has 8 divisors (see below), whose sum is σ = 185998079393568. Its totient is φ = 61779503910924.

The previous prime is 123778863708763. The next prime is 123778863708809. The reversal of 123778863708778 is 877807368877321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 54963970326 + ... + 54963972577.

It is an arithmetic number, because the mean of its divisors is an integer number (23249759924196).

Almost surely, 2^{123778863708778} is an apocalyptic number.

123778863708778 is a deficient number, since it is larger than the sum of its proper divisors (62219215684790).

123778863708778 is a wasteful number, since it uses less digits than its factorization.

123778863708778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109927943468.

The product of its (nonzero) digits is 7434878976, while the sum is 82.

The spelling of 123778863708778 in words is "one hundred twenty-three trillion, seven hundred seventy-eight billion, eight hundred sixty-three million, seven hundred eight thousand, seven hundred seventy-eight".