320656549454651 has 2 divisors, whose sum is σ = 320656549454652. Its totient is φ = 320656549454650.

The previous prime is 320656549454641. The next prime is 320656549454663. The reversal of 320656549454651 is 156454945656023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320656549454651 - 2²² = 320656545260347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (320656549454641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160328274727325 + 160328274727326.

It is an arithmetic number, because the mean of its divisors is an integer number (160328274727326).

Almost surely, 2^{320656549454651} is an apocalyptic number.

320656549454651 is a deficient number, since it is larger than the sum of its proper divisors (1).

320656549454651 is an equidigital number, since it uses as much as digits as its factorization.

320656549454651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560000, while the sum is 65.

The spelling of 320656549454651 in words is "three hundred twenty trillion, six hundred fifty-six billion, five hundred forty-nine million, four hundred fifty-four thousand, six hundred fifty-one".