1918286040197 has 8 divisors (see below), whose sum is σ = 1933807143840. Its totient is φ = 1902778235280.

The previous prime is 1918286040193. The next prime is 1918286040199. The reversal of 1918286040197 is 7910406828191.

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

It is a cyclic number.

It is not a de Polignac number, because 1918286040197 - 2² = 1918286040193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918286040193) 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, 3034922 + ... + 3612107.

It is an arithmetic number, because the mean of its divisors is an integer number (241725892980).

Almost surely, 2^{1918286040197} is an apocalyptic number.

It is an amenable number.

1918286040197 is a deficient number, since it is larger than the sum of its proper divisors (15521103643).

1918286040197 is a wasteful number, since it uses less digits than its factorization.

1918286040197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649363.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The spelling of 1918286040197 in words is "one trillion, nine hundred eighteen billion, two hundred eighty-six million, forty thousand, one hundred ninety-seven".