1153561131979 has 2 divisors, whose sum is σ = 1153561131980. Its totient is φ = 1153561131978.

The previous prime is 1153561131971. The next prime is 1153561132049. The reversal of 1153561131979 is 9791311653511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1153561131979 - 2³ = 1153561131971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1153561131971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576780565989 + 576780565990.

It is an arithmetic number, because the mean of its divisors is an integer number (576780565990).

Almost surely, 2^{1153561131979} is an apocalyptic number.

1153561131979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153561131979 is an equidigital number, since it uses as much as digits as its factorization.

1153561131979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 765450, while the sum is 52.

The spelling of 1153561131979 in words is "one trillion, one hundred fifty-three billion, five hundred sixty-one million, one hundred thirty-one thousand, nine hundred seventy-nine".