1971395716118 has 8 divisors (see below), whose sum is σ = 2957104694160. Its totient is φ = 985694151400.

The previous prime is 1971395716117. The next prime is 1971395716139. The reversal of 1971395716118 is 8116175931791.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971395716117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1132433 + ... + 2285868.

It is an arithmetic number, because the mean of its divisors is an integer number (369638086770).

Almost surely, 2^{1971395716118} is an apocalyptic number.

1971395716118 is a deficient number, since it is larger than the sum of its proper divisors (985708978042).

1971395716118 is a wasteful number, since it uses less digits than its factorization.

1971395716118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3706662.

The product of its digits is 2857680, while the sum is 59.

The spelling of 1971395716118 in words is "one trillion, nine hundred seventy-one billion, three hundred ninety-five million, seven hundred sixteen thousand, one hundred eighteen".