1911966798138 has 64 divisors (see below), whose sum is σ = 3894111936000. Its totient is φ = 625738568000.

The previous prime is 1911966798113. The next prime is 1911966798163. The reversal of 1911966798138 is 8318976691191.

It is an interprime number because it is at equal distance from previous prime (1911966798113) and next prime (1911966798163).

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 118991581 + ... + 119007647.

It is an arithmetic number, because the mean of its divisors is an integer number (60845499000).

Almost surely, 2^{1911966798138} is an apocalyptic number.

1911966798138 is an abundant number, since it is smaller than the sum of its proper divisors (1982145137862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1911966798138 is a wasteful number, since it uses less digits than its factorization.

1911966798138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17803.

The product of its digits is 35271936, while the sum is 69.

The spelling of 1911966798138 in words is "one trillion, nine hundred eleven billion, nine hundred sixty-six million, seven hundred ninety-eight thousand, one hundred thirty-eight".