1918073291905 has 16 divisors (see below), whose sum is σ = 2313726007680. Its totient is φ = 1526434034688.

The previous prime is 1918073291879. The next prime is 1918073291921. The reversal of 1918073291905 is 5091923708191.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1918073291905 - 2¹⁹ = 1918072767617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28799974 + ... + 28866496.

It is an arithmetic number, because the mean of its divisors is an integer number (144607875480).

Almost surely, 2^{1918073291905} is an apocalyptic number.

It is an amenable number.

1918073291905 is a deficient number, since it is larger than the sum of its proper divisors (395652715775).

1918073291905 is a wasteful number, since it uses less digits than its factorization.

1918073291905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96600.

The product of its (nonzero) digits is 1224720, while the sum is 55.

The spelling of 1918073291905 in words is "one trillion, nine hundred eighteen billion, seventy-three million, two hundred ninety-one thousand, nine hundred five".