161063700009 has 4 divisors (see below), whose sum is σ = 214751600016. Its totient is φ = 107375800004.

The previous prime is 161063699971. The next prime is 161063700019. The reversal of 161063700009 is 900007360161.

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 161063700009 - 2¹¹ = 161063697961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161063700019) 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, 26843949999 + ... + 26843950004.

It is an arithmetic number, because the mean of its divisors is an integer number (53687900004).

Almost surely, 2^161063700009 is an apocalyptic number.

It is an amenable number.

161063700009 is a deficient number, since it is larger than the sum of its proper divisors (53687900007).

161063700009 is an equidigital number, since it uses as much as digits as its factorization.

161063700009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53687900006.

The product of its (nonzero) digits is 6804, while the sum is 33.

The spelling of 161063700009 in words is "one hundred sixty-one billion, sixty-three million, seven hundred thousand, nine".