1916541879281 has 8 divisors (see below), whose sum is σ = 1924954108800. Its totient is φ = 1908132927120.

The previous prime is 1916541879247. The next prime is 1916541879283. The reversal of 1916541879281 is 1829781456191.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1916541879281 is a prime.

It is a super-2 number, since 2×1916541879281² (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 (1916541879283) 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, 356486 + ... + 1990016.

It is an arithmetic number, because the mean of its divisors is an integer number (240619263600).

Almost surely, 2^{1916541879281} is an apocalyptic number.

It is an amenable number.

1916541879281 is a deficient number, since it is larger than the sum of its proper divisors (8412229519).

1916541879281 is a wasteful number, since it uses less digits than its factorization.

1916541879281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638679.

The product of its digits is 8709120, while the sum is 62.

The spelling of 1916541879281 in words is "one trillion, nine hundred sixteen billion, five hundred forty-one million, eight hundred seventy-nine thousand, two hundred eighty-one".