1179781951499 has 4 divisors (see below), whose sum is σ = 1241875738440. Its totient is φ = 1117688164560.

The previous prime is 1179781951441. The next prime is 1179781951589. The reversal of 1179781951499 is 9941591879711.

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

It is a cyclic number.

It is not a de Polignac number, because 1179781951499 - 2¹⁶ = 1179781885963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1179781951429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31046893442 + ... + 31046893479.

It is an arithmetic number, because the mean of its divisors is an integer number (310468934610).

Almost surely, 2^{1179781951499} is an apocalyptic number.

1179781951499 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1179781951499 is a deficient number, since it is larger than the sum of its proper divisors (62093786941).

1179781951499 is an equidigital number, since it uses as much as digits as its factorization.

1179781951499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62093786940.

The product of its digits is 51438240, while the sum is 71.

The spelling of 1179781951499 in words is "one trillion, one hundred seventy-nine billion, seven hundred eighty-one million, nine hundred fifty-one thousand, four hundred ninety-nine".