1917612981242 has 16 divisors (see below), whose sum is σ = 3299204186880. Its totient is φ = 818867222928.

The previous prime is 1917612981223. The next prime is 1917612981293. The reversal of 1917612981242 is 2421892167191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247238642 + ... + 247246397.

It is an arithmetic number, because the mean of its divisors is an integer number (206200261680).

Almost surely, 2^{1917612981242} is an apocalyptic number.

1917612981242 is a deficient number, since it is larger than the sum of its proper divisors (1381591205638).

1917612981242 is a wasteful number, since it uses less digits than its factorization.

1917612981242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494485325.

The product of its digits is 870912, while the sum is 53.

The spelling of 1917612981242 in words is "one trillion, nine hundred seventeen billion, six hundred twelve million, nine hundred eighty-one thousand, two hundred forty-two".