161960919120001 has 4 divisors (see below), whose sum is σ = 162293487742912. Its totient is φ = 161628350497092.

The previous prime is 161960919119981. The next prime is 161960919120047. The reversal of 161960919120001 is 100021919069161.

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 161960919120001 - 2²⁹ = 161960382249089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161960979120001) 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, 166284310725 + ... + 166284311698.

It is an arithmetic number, because the mean of its divisors is an integer number (40573371935728).

Almost surely, 2^{161960919120001} is an apocalyptic number.

It is an amenable number.

161960919120001 is a deficient number, since it is larger than the sum of its proper divisors (332568622911).

161960919120001 is an equidigital number, since it uses as much as digits as its factorization.

161960919120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332568622910.

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 161960919120001 in words is "one hundred sixty-one trillion, nine hundred sixty billion, nine hundred nineteen million, one hundred twenty thousand, one".