1179455561839 has 4 divisors (see below), whose sum is σ = 1211332739224. Its totient is φ = 1147578384456.

The previous prime is 1179455561821. The next prime is 1179455561863. The reversal of 1179455561839 is 9381655549711.

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 1179455561839 - 2³⁹ = 629699747951 is a prime.

It is a super-2 number, since 2×1179455561839² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1179455561239) 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, 15938588637 + ... + 15938588710.

It is an arithmetic number, because the mean of its divisors is an integer number (302833184806).

Almost surely, 2^{1179455561839} is an apocalyptic number.

1179455561839 is a deficient number, since it is larger than the sum of its proper divisors (31877177385).

1179455561839 is an equidigital number, since it uses as much as digits as its factorization.

1179455561839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31877177384.

The product of its digits is 40824000, while the sum is 64.

The spelling of 1179455561839 in words is "one trillion, one hundred seventy-nine billion, four hundred fifty-five million, five hundred sixty-one thousand, eight hundred thirty-nine".