11830378198987 has 4 divisors (see below), whose sum is σ = 11832884108856. Its totient is φ = 11827872289120.

The previous prime is 11830378198981. The next prime is 11830378199023. The reversal of 11830378198987 is 78989187303811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11830378198987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11830378198981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252947853 + ... + 1252957294.

It is an arithmetic number, because the mean of its divisors is an integer number (2958221027214).

Almost surely, 2^{11830378198987} is an apocalyptic number.

11830378198987 is a deficient number, since it is larger than the sum of its proper divisors (2505909869).

11830378198987 is an equidigital number, since it uses as much as digits as its factorization.

11830378198987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505909868.

The product of its (nonzero) digits is 146313216, while the sum is 73.

The spelling of 11830378198987 in words is "eleven trillion, eight hundred thirty billion, three hundred seventy-eight million, one hundred ninety-eight thousand, nine hundred eighty-seven".