1917243137969 has 8 divisors (see below), whose sum is σ = 2008208391552. Its totient is φ = 1826911789120.

The previous prime is 1917243137897. The next prime is 1917243138007. The reversal of 1917243137969 is 9697313427191.

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 1917243137969 - 2⁸ = 1917243137713 is a prime.

It is a super-2 number, since 2×1917243137969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1917243137569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158469992 + ... + 158482089.

It is an arithmetic number, because the mean of its divisors is an integer number (251026048944).

Almost surely, 2^{1917243137969} is an apocalyptic number.

It is an amenable number.

1917243137969 is a deficient number, since it is larger than the sum of its proper divisors (90965253583).

1917243137969 is a wasteful number, since it uses less digits than its factorization.

1917243137969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316952367.

The product of its digits is 15431472, while the sum is 62.

The spelling of 1917243137969 in words is "one trillion, nine hundred seventeen billion, two hundred forty-three million, one hundred thirty-seven thousand, nine hundred sixty-nine".