320123145021645 has 96 divisors (see below), whose sum is σ = 597103117623936. Its totient is φ = 146027324620800.

The previous prime is 320123145021637. The next prime is 320123145021709. The reversal of 320123145021645 is 546120541321023.

It is not a de Polignac number, because 320123145021645 - 2³ = 320123145021637 is a prime.

It is a super-3 number, since 3×320123145021645³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1022336505 + ... + 1022649585.

It is an arithmetic number, because the mean of its divisors is an integer number (6219824141916).

Almost surely, 2^{320123145021645} is an apocalyptic number.

320123145021645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320123145021645 is a deficient number, since it is larger than the sum of its proper divisors (276979972602291).

320123145021645 is a wasteful number, since it uses less digits than its factorization.

320123145021645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316091 (or 316084 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 320123145021645 its reverse (546120541321023), we get a palindrome (866243686342668).

The spelling of 320123145021645 in words is "three hundred twenty trillion, one hundred twenty-three billion, one hundred forty-five million, twenty-one thousand, six hundred forty-five".