1917921810514 has 16 divisors (see below), whose sum is σ = 2907413103168. Its totient is φ = 948806601232.

The previous prime is 1917921810479. The next prime is 1917921810523. The reversal of 1917921810514 is 4150181297191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5451934 + ... + 5793049.

It is an arithmetic number, because the mean of its divisors is an integer number (181713318948).

Almost surely, 2^{1917921810514} is an apocalyptic number.

1917921810514 is a deficient number, since it is larger than the sum of its proper divisors (989491292654).

1917921810514 is a wasteful number, since it uses less digits than its factorization.

1917921810514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245889.

The product of its (nonzero) digits is 181440, while the sum is 49.

The spelling of 1917921810514 in words is "one trillion, nine hundred seventeen billion, nine hundred twenty-one million, eight hundred ten thousand, five hundred fourteen".