1918786878692 has 6 divisors (see below), whose sum is σ = 3357877037718. Its totient is φ = 959393439344.

The previous prime is 1918786878529. The next prime is 1918786878703. The reversal of 1918786878692 is 2968786878191.

It can be written as a sum of positive squares in only one way, i.e., 1502472868516 + 416314010176 = 1225754^2 + 645224^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239848359833 + ... + 239848359840.

It is an arithmetic number, because the mean of its divisors is an integer number (559646172953).

Almost surely, 2^{1918786878692} is an apocalyptic number.

It is an amenable number.

1918786878692 is a deficient number, since it is larger than the sum of its proper divisors (1439090159026).

1918786878692 is a wasteful number, since it uses less digits than its factorization.

1918786878692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479696719677 (or 479696719675 counting only the distinct ones).

The product of its digits is 1170505728, while the sum is 80.

The spelling of 1918786878692 in words is "one trillion, nine hundred eighteen billion, seven hundred eighty-six million, eight hundred seventy-eight thousand, six hundred ninety-two".