1491545395824 has 320 divisors, whose sum is σ = 4391718912000. Its totient is φ = 432068152320.

The previous prime is 1491545395811. The next prime is 1491545395829. The reversal of 1491545395824 is 4285935451941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491545395829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1036514497 + ... + 1036515935.

It is an arithmetic number, because the mean of its divisors is an integer number (13724121600).

Almost surely, 2^{1491545395824} 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 1491545395824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2195859456000).

1491545395824 is an abundant number, since it is smaller than the sum of its proper divisors (2900173516176).

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

1491545395824 is a wasteful number, since it uses less digits than its factorization.

1491545395824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116 (or 2110 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 60.

The spelling of 1491545395824 in words is "one trillion, four hundred ninety-one billion, five hundred forty-five million, three hundred ninety-five thousand, eight hundred twenty-four".