1247132779982 has 4 divisors (see below), whose sum is σ = 1870699169976. Its totient is φ = 623566389990.

The previous prime is 1247132779961. The next prime is 1247132780017. The reversal of 1247132779982 is 2899772317421.

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

It is a congruent 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 as a sum of consecutive naturals, namely, 311783194994 + ... + 311783194997.

It is an arithmetic number, because the mean of its divisors is an integer number (467674792494).

Almost surely, 2^{1247132779982} is an apocalyptic number.

1247132779982 is a deficient number, since it is larger than the sum of its proper divisors (623566389994).

1247132779982 is an equidigital number, since it uses as much as digits as its factorization.

1247132779982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623566389993.

The product of its digits is 21337344, while the sum is 62.

The spelling of 1247132779982 in words is "one trillion, two hundred forty-seven billion, one hundred thirty-two million, seven hundred seventy-nine thousand, nine hundred eighty-two".