501326480640 has 288 divisors, whose sum is σ = 1624546344960. Its totient is φ = 131738738688.

The previous prime is 501326480593. The next prime is 501326480657. The reversal of 501326480640 is 46084623105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139916289 + ... + 139919871.

It is an arithmetic number, because the mean of its divisors is an integer number (5640785920).

Almost surely, 2^501326480640 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 501326480640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812273172480).

501326480640 is an abundant number, since it is smaller than the sum of its proper divisors (1123219864320).

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

501326480640 is a wasteful number, since it uses less digits than its factorization.

501326480640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 501326480640 in words is "five hundred one billion, three hundred twenty-six million, four hundred eighty thousand, six hundred forty".