320551641764545 has 8 divisors (see below), whose sum is σ = 384664890698496. Its totient is φ = 256439366357616.

The previous prime is 320551641764489. The next prime is 320551641764551. The reversal of 320551641764545 is 545467146155023.

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

It is a cyclic number.

It is not a de Polignac number, because 320551641764545 - 2⁹ = 320551641764033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320551641764545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242657167 + ... + 243974596.

It is an arithmetic number, because the mean of its divisors is an integer number (48083111337312).

Almost surely, 2^{320551641764545} is an apocalyptic number.

It is an amenable number.

320551641764545 is a deficient number, since it is larger than the sum of its proper divisors (64113248933951).

320551641764545 is a wasteful number, since it uses less digits than its factorization.

320551641764545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486763511.

The product of its (nonzero) digits is 60480000, while the sum is 58.

The spelling of 320551641764545 in words is "three hundred twenty trillion, five hundred fifty-one billion, six hundred forty-one million, seven hundred sixty-four thousand, five hundred forty-five".