731375536320 has 2016 divisors, whose sum is σ = 3253693060800. Its totient is φ = 149193031680.

The previous prime is 731375536277. The next prime is 731375536321. The reversal of 731375536320 is 23635573137.

731375536320 is a `hidden beast` number, since 7 + 3 + 1 + 3 + 7 + 5 + 5 + 3 + 632 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (731375536321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2496162094 + ... + 2496162386.

It is an arithmetic number, because the mean of its divisors is an integer number (1613935050).

Almost surely, 2^731375536320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731375536320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626846530400).

731375536320 is an abundant number, since it is smaller than the sum of its proper divisors (2522317524480).

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

731375536320 is a wasteful number, since it uses less digits than its factorization.

731375536320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 1190700, while the sum is 45.

The spelling of 731375536320 in words is "seven hundred thirty-one billion, three hundred seventy-five million, five hundred thirty-six thousand, three hundred twenty".