1171807418081 has 4 divisors (see below), whose sum is σ = 1173128509632. Its totient is φ = 1170486326532.

The previous prime is 1171807418071. The next prime is 1171807418101. The reversal of 1171807418081 is 1808147081711.

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 1171807418081 - 2²⁶ = 1171740309217 is a prime.

It is a super-2 number, since 2×1171807418081² (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 (1171807418011) 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, 660544445 + ... + 660546218.

It is an arithmetic number, because the mean of its divisors is an integer number (293282127408).

Almost surely, 2^{1171807418081} is an apocalyptic number.

It is an amenable number.

1171807418081 is a deficient number, since it is larger than the sum of its proper divisors (1321091551).

1171807418081 is an equidigital number, since it uses as much as digits as its factorization.

1171807418081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321091550.

The product of its (nonzero) digits is 100352, while the sum is 47.

The spelling of 1171807418081 in words is "one trillion, one hundred seventy-one billion, eight hundred seven million, four hundred eighteen thousand, eighty-one".