731865079680 has 1536 divisors, whose sum is σ = 3059052134400. Its totient is φ = 145291345920.

The previous prime is 731865079679. The next prime is 731865079681. The reversal of 731865079680 is 86970568137.

731865079680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (731865079679) and next prime (731865079681).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731865079681) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3468554775 + ... + 3468554985.

It is an arithmetic number, because the mean of its divisors is an integer number (1991570400).

Almost surely, 2^731865079680 is an apocalyptic number.

731865079680 is a gapful number since it is divisible by the number (70) 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 731865079680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529526067200).

731865079680 is an abundant number, since it is smaller than the sum of its proper divisors (2327187054720).

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

731865079680 is a wasteful number, since it uses less digits than its factorization.

731865079680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 731865079680 in words is "seven hundred thirty-one billion, eight hundred sixty-five million, seventy-nine thousand, six hundred eighty".