161989706001 has 8 divisors (see below), whose sum is σ = 215988366880. Its totient is φ = 107992091232.

The previous prime is 161989705967. The next prime is 161989706003. The reversal of 161989706001 is 100607989161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161989706001 - 2⁶ = 161989705937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161989706003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233826 + ... + 615348.

It is an arithmetic number, because the mean of its divisors is an integer number (26998545860).

Almost surely, 2^161989706001 is an apocalyptic number.

It is an amenable number.

161989706001 is a deficient number, since it is larger than the sum of its proper divisors (53998660879).

161989706001 is a wasteful number, since it uses less digits than its factorization.

161989706001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523055.

The product of its (nonzero) digits is 163296, while the sum is 48.

The spelling of 161989706001 in words is "one hundred sixty-one billion, nine hundred eighty-nine million, seven hundred six thousand, one".