320536053120561 has 4 divisors (see below), whose sum is σ = 427381404160752. Its totient is φ = 213690702080372.

The previous prime is 320536053120553. The next prime is 320536053120611. The reversal of 320536053120561 is 165021350635023.

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 320536053120561 - 2³ = 320536053120553 is a prime.

It is a super-2 number, since 2×320536053120561² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320536053120461) 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, 53422675520091 + ... + 53422675520096.

It is an arithmetic number, because the mean of its divisors is an integer number (106845351040188).

Almost surely, 2^{320536053120561} is an apocalyptic number.

It is an amenable number.

320536053120561 is a deficient number, since it is larger than the sum of its proper divisors (106845351040191).

320536053120561 is a wasteful number, since it uses less digits than its factorization.

320536053120561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106845351040190.

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 320536053120561 in words is "three hundred twenty trillion, five hundred thirty-six billion, fifty-three million, one hundred twenty thousand, five hundred sixty-one".