1323305251640 has 64 divisors (see below), whose sum is σ = 2986780262400. Its totient is φ = 527663127168.

The previous prime is 1323305251633. The next prime is 1323305251663. The reversal of 1323305251640 is 461525033231.

It is a happy number.

It is a super-2 number, since 2×1323305251640² (a number of 25 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 1323305251640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20811977 + ... + 20875463.

It is an arithmetic number, because the mean of its divisors is an integer number (46668441600).

Almost surely, 2^{1323305251640} is an apocalyptic number.

1323305251640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323305251640 is an abundant number, since it is smaller than the sum of its proper divisors (1663475010760).

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

1323305251640 is a wasteful number, since it uses less digits than its factorization.

1323305251640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65124 (or 65120 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 1323305251640 in words is "one trillion, three hundred twenty-three billion, three hundred five million, two hundred fifty-one thousand, six hundred forty".