1181437340161 has 8 divisors (see below), whose sum is σ = 1273541709440. Its totient is φ = 1089507910032.

The previous prime is 1181437340071. The next prime is 1181437340191. The reversal of 1181437340161 is 1610437341811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1181437340161 - 2²³ = 1181428951553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1181437340191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43720755 + ... + 43747768.

It is an arithmetic number, because the mean of its divisors is an integer number (159192713680).

Almost surely, 2^{1181437340161} is an apocalyptic number.

It is an amenable number.

1181437340161 is a deficient number, since it is larger than the sum of its proper divisors (92104369279).

1181437340161 is a wasteful number, since it uses less digits than its factorization.

1181437340161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87469575.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 1181437340161 in words is "one trillion, one hundred eighty-one billion, four hundred thirty-seven million, three hundred forty thousand, one hundred sixty-one".