1171627887481 has 4 divisors (see below), whose sum is σ = 1174073875200. Its totient is φ = 1169181899764.

The previous prime is 1171627887467. The next prime is 1171627887491. The reversal of 1171627887481 is 1847887261711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1171627887481 - 2¹⁵ = 1171627854713 is a prime.

It is a super-2 number, since 2×1171627887481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171627887491) 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, 1222993141 + ... + 1222994098.

It is an arithmetic number, because the mean of its divisors is an integer number (293518468800).

Almost surely, 2^{1171627887481} is an apocalyptic number.

It is an amenable number.

1171627887481 is a deficient number, since it is larger than the sum of its proper divisors (2445987719).

1171627887481 is an equidigital number, since it uses as much as digits as its factorization.

1171627887481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445987718.

The product of its digits is 8429568, while the sum is 61.

The spelling of 1171627887481 in words is "one trillion, one hundred seventy-one billion, six hundred twenty-seven million, eight hundred eighty-seven thousand, four hundred eighty-one".