1161155262979 has 2 divisors, whose sum is σ = 1161155262980. Its totient is φ = 1161155262978.

The previous prime is 1161155262977. The next prime is 1161155262983. The reversal of 1161155262979 is 9792625511611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161155262979 - 2¹ = 1161155262977 is a prime.

Together with 1161155262977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1161155262973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580577631489 + 580577631490.

It is an arithmetic number, because the mean of its divisors is an integer number (580577631490).

Almost surely, 2^{1161155262979} is an apocalyptic number.

1161155262979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161155262979 is an equidigital number, since it uses as much as digits as its factorization.

1161155262979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 55.

The spelling of 1161155262979 in words is "one trillion, one hundred sixty-one billion, one hundred fifty-five million, two hundred sixty-two thousand, nine hundred seventy-nine".