323640552820 has 48 divisors (see below), whose sum is σ = 749777425488. Its totient is φ = 116583459840.

The previous prime is 323640552811. The next prime is 323640552883. The reversal of 323640552820 is 28255046323.

It can be written as a sum of positive squares in 8 ways, for example, as 85812671844 + 237827880976 = 292938^2 + 487676^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15169479 + ... + 15190798.

It is an arithmetic number, because the mean of its divisors is an integer number (15620363031).

Almost surely, 2^323640552820 is an apocalyptic number.

It is an amenable number.

323640552820 is an abundant number, since it is smaller than the sum of its proper divisors (426136872668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

323640552820 is a wasteful number, since it uses less digits than its factorization.

323640552820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30360340 (or 30360338 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 323640552820 in words is "three hundred twenty-three billion, six hundred forty million, five hundred fifty-two thousand, eight hundred twenty".