161366056107 has 4 divisors (see below), whose sum is σ = 215154741480. Its totient is φ = 107577370736.

The previous prime is 161366056039. The next prime is 161366056123. The reversal of 161366056107 is 701650663161.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 161366056107 - 2³¹ = 159218572459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161366054107) 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, 26894342682 + ... + 26894342687.

It is an arithmetic number, because the mean of its divisors is an integer number (53788685370).

Almost surely, 2^161366056107 is an apocalyptic number.

161366056107 is a deficient number, since it is larger than the sum of its proper divisors (53788685373).

161366056107 is an equidigital number, since it uses as much as digits as its factorization.

161366056107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53788685372.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 161366056107 in words is "one hundred sixty-one billion, three hundred sixty-six million, fifty-six thousand, one hundred seven".