1968186409091 has 32 divisors (see below), whose sum is σ = 2398791283200. Its totient is φ = 1576377202176.

The previous prime is 1968186409081. The next prime is 1968186409097. The reversal of 1968186409091 is 1909046818691.

It is not a de Polignac number, because 1968186409091 - 2²² = 1968182214787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1968186409097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39036200 + ... + 39086586.

It is an arithmetic number, because the mean of its divisors is an integer number (74962227600).

Almost surely, 2^{1968186409091} is an apocalyptic number.

1968186409091 is a deficient number, since it is larger than the sum of its proper divisors (430604874109).

1968186409091 is a wasteful number, since it uses less digits than its factorization.

1968186409091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52763.

The product of its (nonzero) digits is 6718464, while the sum is 62.

The spelling of 1968186409091 in words is "one trillion, nine hundred sixty-eight billion, one hundred eighty-six million, four hundred nine thousand, ninety-one".