731429287680 has 864 divisors, whose sum is σ = 2970763858944. Its totient is φ = 151986143232.

The previous prime is 731429287669. The next prime is 731429287769. The reversal of 731429287680 is 86782924137.

It is a self number, because there is not a number n which added to its sum of digits gives 731429287680.

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, 163885129 + ... + 163889591.

It is an arithmetic number, because the mean of its divisors is an integer number (3438384096).

Almost surely, 2^731429287680 is an apocalyptic number.

731429287680 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 731429287680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485381929472).

731429287680 is an abundant number, since it is smaller than the sum of its proper divisors (2239334571264).

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

731429287680 is a wasteful number, since it uses less digits than its factorization.

731429287680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581 (or 4560 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 731429287680 in words is "seven hundred thirty-one billion, four hundred twenty-nine million, two hundred eighty-seven thousand, six hundred eighty".