320136642423540 has 72 divisors (see below), whose sum is σ = 1022190682836960. Its totient is φ = 80876625453504.

The previous prime is 320136642423539. The next prime is 320136642423547. The reversal of 320136642423540 is 45324246631023.

320136642423540 is a `hidden beast` number, since 3 + 2 + 0 + 1 + 3 + 6 + 64 + 2 + 42 + 3 + 540 = 666.

It is a super-3 number, since 3×320136642423540³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320136642423547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46803599274 + ... + 46803606113.

It is an arithmetic number, because the mean of its divisors is an integer number (14197092817180).

Almost surely, 2^{320136642423540} is an apocalyptic number.

320136642423540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320136642423540 is an abundant number, since it is smaller than the sum of its proper divisors (702054040413420).

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

320136642423540 is a wasteful number, since it uses less digits than its factorization.

320136642423540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93607205421 (or 93607205416 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

The spelling of 320136642423540 in words is "three hundred twenty trillion, one hundred thirty-six billion, six hundred forty-two million, four hundred twenty-three thousand, five hundred forty".