2118378773902 has 16 divisors (see below), whose sum is σ = 3202662684672. Its totient is φ = 1050824932920.

The previous prime is 2118378773881. The next prime is 2118378773909. The reversal of 2118378773902 is 2093778738112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118378773909) 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, 16397653 + ... + 16526335.

It is an arithmetic number, because the mean of its divisors is an integer number (200166417792).

Almost surely, 2^{2118378773902} is an apocalyptic number.

2118378773902 is a deficient number, since it is larger than the sum of its proper divisors (1084283910770).

2118378773902 is a wasteful number, since it uses less digits than its factorization.

2118378773902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193623.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 2118378773902 in words is "two trillion, one hundred eighteen billion, three hundred seventy-eight million, seven hundred seventy-three thousand, nine hundred two".