181117970269145 has 64 divisors (see below), whose sum is σ = 270284738465280. Its totient is φ = 113447352066048.

The previous prime is 181117970269109. The next prime is 181117970269217. The reversal of 181117970269145 is 541962079711181.

181117970269145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 181117970269145 - 2⁸ = 181117970268889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 409484171 + ... + 409926239.

It is an arithmetic number, because the mean of its divisors is an integer number (4223199038520).

Almost surely, 2^{181117970269145} is an apocalyptic number.

It is an amenable number.

181117970269145 is a deficient number, since it is larger than the sum of its proper divisors (89166768196135).

181117970269145 is a wasteful number, since it uses less digits than its factorization.

181117970269145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451474.

The product of its (nonzero) digits is 7620480, while the sum is 62.

The spelling of 181117970269145 in words is "one hundred eighty-one trillion, one hundred seventeen billion, nine hundred seventy million, two hundred sixty-nine thousand, one hundred forty-five".