320120161463661 has 16 divisors (see below), whose sum is σ = 483852335816640. Its totient is φ = 186628758099840.

The previous prime is 320120161463653. The next prime is 320120161463719. The reversal of 320120161463661 is 166364161021023.

It is a happy number.

It is not a de Polignac number, because 320120161463661 - 2³ = 320120161463653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320120161463161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216005506320 + ... + 216005507801.

It is an arithmetic number, because the mean of its divisors is an integer number (30240770988540).

Almost surely, 2^{320120161463661} is an apocalyptic number.

It is an amenable number.

320120161463661 is a deficient number, since it is larger than the sum of its proper divisors (163732174352979).

320120161463661 is a wasteful number, since it uses less digits than its factorization.

320120161463661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432011014156.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 320120161463661 in words is "three hundred twenty trillion, one hundred twenty billion, one hundred sixty-one million, four hundred sixty-three thousand, six hundred sixty-one".