1917973007042 has 8 divisors (see below), whose sum is σ = 2876983673916. Its totient is φ = 958978449072.

The previous prime is 1917973007029. The next prime is 1917973007099. The reversal of 1917973007042 is 2407003797191.

It can be written as a sum of positive squares in 2 ways, for example, as 1869780025201 + 48192981841 = 1367399^2 + 219529^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3725033 + ... + 4208540.

Almost surely, 2^{1917973007042} is an apocalyptic number.

1917973007042 is a deficient number, since it is larger than the sum of its proper divisors (959010666874).

1917973007042 is a wasteful number, since it uses less digits than its factorization.

1917973007042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054452.

The product of its (nonzero) digits is 666792, while the sum is 50.

The spelling of 1917973007042 in words is "one trillion, nine hundred seventeen billion, nine hundred seventy-three million, seven thousand, forty-two".