320515753885 has 4 divisors (see below), whose sum is σ = 384618904668. Its totient is φ = 256412603104.

The previous prime is 320515753861. The next prime is 320515753993. The reversal of 320515753885 is 588357515023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253598859396 + 66916894489 = 503586^2 + 258683^2 .

It is a cyclic number.

It is not a de Polignac number, because 320515753885 - 2⁷ = 320515753757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32051575384 + ... + 32051575393.

It is an arithmetic number, because the mean of its divisors is an integer number (96154726167).

Almost surely, 2^320515753885 is an apocalyptic number.

It is an amenable number.

320515753885 is a deficient number, since it is larger than the sum of its proper divisors (64103150783).

320515753885 is an equidigital number, since it uses as much as digits as its factorization.

320515753885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64103150782.

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 320515753885 in words is "three hundred twenty billion, five hundred fifteen million, seven hundred fifty-three thousand, eight hundred eighty-five".