320515540140140 has 48 divisors (see below), whose sum is σ = 689502324399840. Its totient is φ = 125078683614720.

The previous prime is 320515540140121. The next prime is 320515540140179. The reversal of 320515540140140 is 41041045515023.

It is a happy number.

It is a super-2 number, since 2×320515540140140² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320515540140140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219559766 + ... + 221014754.

It is an arithmetic number, because the mean of its divisors is an integer number (14364631758330).

Almost surely, 2^{320515540140140} is an apocalyptic number.

It is an amenable number.

320515540140140 is an abundant number, since it is smaller than the sum of its proper divisors (368986784259700).

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

320515540140140 is a wasteful number, since it uses less digits than its factorization.

320515540140140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723682 (or 1723680 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 320515540140140 its reverse (41041045515023), we get a palindrome (361556585655163).

The spelling of 320515540140140 in words is "three hundred twenty trillion, five hundred fifteen billion, five hundred forty million, one hundred forty thousand, one hundred forty".