1323957005280 has 2304 divisors, whose sum is σ = 6215698944000. Its totient is φ = 262063226880.

The previous prime is 1323957005279. The next prime is 1323957005303. The reversal of 1323957005280 is 825007593231.

1323957005280 is a `hidden beast` number, since 1 + 3 + 23 + 9 + 570 + 0 + 52 + 8 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 4257096325 + ... + 4257096635.

It is an arithmetic number, because the mean of its divisors is an integer number (2697786000).

Almost surely, 2^{1323957005280} is an apocalyptic number.

1323957005280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323957005280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3107849472000).

1323957005280 is an abundant number, since it is smaller than the sum of its proper divisors (4891741938720).

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

1323957005280 is a wasteful number, since it uses less digits than its factorization.

1323957005280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 1323957005280 in words is "one trillion, three hundred twenty-three billion, nine hundred fifty-seven million, five thousand, two hundred eighty".