6391322129772 has 96 divisors (see below), whose sum is σ = 17152401369600. Its totient is φ = 2055666312000.

The previous prime is 6391322129749. The next prime is 6391322129783. The reversal of 6391322129772 is 2779212231936.

6391322129772 is a `hidden beast` number, since 6 + 391 + 3 + 221 + 29 + 7 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 4270897 + ... + 5569847.

It is an arithmetic number, because the mean of its divisors is an integer number (178670847600).

Almost surely, 2^{6391322129772} 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 6391322129772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8576200684800).

6391322129772 is an abundant number, since it is smaller than the sum of its proper divisors (10761079239828).

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

6391322129772 is a wasteful number, since it uses less digits than its factorization.

6391322129772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300564 (or 1300556 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 6391322129772 in words is "six trillion, three hundred ninety-one billion, three hundred twenty-two million, one hundred twenty-nine thousand, seven hundred seventy-two".