6321244172540 has 96 divisors (see below), whose sum is σ = 14952320022528. Its totient is φ = 2223921888000.

The previous prime is 6321244172521. The next prime is 6321244172543. The reversal of 6321244172540 is 452714421236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6321244172543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27307967 + ... + 27538473.

It is an arithmetic number, because the mean of its divisors is an integer number (155753333568).

Almost surely, 2^{6321244172540} 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 6321244172540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7476160011264).

6321244172540 is an abundant number, since it is smaller than the sum of its proper divisors (8631075849988).

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

6321244172540 is a wasteful number, since it uses less digits than its factorization.

6321244172540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234579 (or 234577 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

Adding to 6321244172540 its reverse (452714421236), we get a palindrome (6773958593776).

The spelling of 6321244172540 in words is "six trillion, three hundred twenty-one billion, two hundred forty-four million, one hundred seventy-two thousand, five hundred forty".