161200111006657 has 4 divisors (see below), whose sum is σ = 161444724225840. Its totient is φ = 160955497787476.

The previous prime is 161200111006651. The next prime is 161200111006667. The reversal of 161200111006657 is 756600111002161.

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 161200111006657 - 2¹¹ = 161200111004609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161200111006651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122306608603 + ... + 122306609920.

It is an arithmetic number, because the mean of its divisors is an integer number (40361181056460).

Almost surely, 2^{161200111006657} is an apocalyptic number.

It is an amenable number.

161200111006657 is a deficient number, since it is larger than the sum of its proper divisors (244613219183).

161200111006657 is an equidigital number, since it uses as much as digits as its factorization.

161200111006657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244613219182.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 161200111006657 in words is "one hundred sixty-one trillion, two hundred billion, one hundred eleven million, six thousand, six hundred fifty-seven".