181117970269147 has 4 divisors (see below), whose sum is σ = 181140578936536. Its totient is φ = 181095361601760.

The previous prime is 181117970269109. The next prime is 181117970269217. The reversal of 181117970269147 is 741962079711181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181117970269147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181117970260147) 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, 11304321678 + ... + 11304337699.

It is an arithmetic number, because the mean of its divisors is an integer number (45285144734134).

Almost surely, 2^{181117970269147} is an apocalyptic number.

181117970269147 is a deficient number, since it is larger than the sum of its proper divisors (22608667389).

181117970269147 is an equidigital number, since it uses as much as digits as its factorization.

181117970269147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22608667388.

The product of its (nonzero) digits is 10668672, while the sum is 64.

The spelling of 181117970269147 in words is "one hundred eighty-one trillion, one hundred seventeen billion, nine hundred seventy million, two hundred sixty-nine thousand, one hundred forty-seven".