731008696320 has 1536 divisors, whose sum is σ = 3123635074560. Its totient is φ = 160526499840.

The previous prime is 731008696289. The next prime is 731008696343. The reversal of 731008696320 is 23696800137.

731008696320 is a `hidden beast` number, since 7 + 3 + 1 + 0 + 0 + 8 + 6 + 9 + 632 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1536).

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 95 ways as a sum of consecutive naturals, for example, 11983749090 + ... + 11983749150.

It is an arithmetic number, because the mean of its divisors is an integer number (2033616585).

Almost surely, 2^731008696320 is an apocalyptic number.

731008696320 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 731008696320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1561817537280).

731008696320 is an abundant number, since it is smaller than the sum of its proper divisors (2392626378240).

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

731008696320 is an frugal number, since it uses more digits than its factorization.

731008696320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 731008696320 in words is "seven hundred thirty-one billion, eight million, six hundred ninety-six thousand, three hundred twenty".