1161455229791 has 4 divisors (see below), whose sum is σ = 1161903151872. Its totient is φ = 1161007307712.

The previous prime is 1161455229751. The next prime is 1161455229793. The reversal of 1161455229791 is 1979225541611.

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 1161455229791 - 2²² = 1161451035487 is a prime.

It is a super-3 number, since 3×1161455229791³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161455229793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223957151 + ... + 223962336.

It is an arithmetic number, because the mean of its divisors is an integer number (290475787968).

Almost surely, 2^{1161455229791} is an apocalyptic number.

1161455229791 is a deficient number, since it is larger than the sum of its proper divisors (447922081).

1161455229791 is an equidigital number, since it uses as much as digits as its factorization.

1161455229791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447922080.

The product of its digits is 1360800, while the sum is 53.

The spelling of 1161455229791 in words is "one trillion, one hundred sixty-one billion, four hundred fifty-five million, two hundred twenty-nine thousand, seven hundred ninety-one".