320657013632 has 64 divisors (see below), whose sum is σ = 672558950400. Its totient is φ = 151861132800.

The previous prime is 320657013619. The next prime is 320657013697. The reversal of 320657013632 is 236310756023.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18014657 + ... + 18032447.

It is an arithmetic number, because the mean of its divisors is an integer number (10508733600).

Almost surely, 2^320657013632 is an apocalyptic number.

320657013632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320657013632 is an abundant number, since it is smaller than the sum of its proper divisors (351901936768).

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

320657013632 is a wasteful number, since it uses less digits than its factorization.

320657013632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25235 (or 25223 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 38.

Adding to 320657013632 its reverse (236310756023), we get a palindrome (556967769655).

The spelling of 320657013632 in words is "three hundred twenty billion, six hundred fifty-seven million, thirteen thousand, six hundred thirty-two".