6591997501440 has 448 divisors, whose sum is σ = 22740262465536. Its totient is φ = 1620888256512.

The previous prime is 6591997501409. The next prime is 6591997501489. The reversal of 6591997501440 is 441057991956.

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

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, 2081462737 + ... + 2081465903.

It is an arithmetic number, because the mean of its divisors is an integer number (50759514432).

Almost surely, 2^{6591997501440} is an apocalyptic number.

6591997501440 is a gapful number since it is divisible by the number (60) 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 6591997501440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11370131232768).

6591997501440 is an abundant number, since it is smaller than the sum of its proper divisors (16148264964096).

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

6591997501440 is a wasteful number, since it uses less digits than its factorization.

6591997501440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 6591997501440 in words is "six trillion, five hundred ninety-one billion, nine hundred ninety-seven million, five hundred one thousand, four hundred forty".