1491503345280 has 256 divisors, whose sum is σ = 5688747590400. Its totient is φ = 367139229696.

The previous prime is 1491503345239. The next prime is 1491503345281. The reversal of 1491503345280 is 825433051941.

1491503345280 is a `hidden beast` number, since 1 + 4 + 91 + 5 + 0 + 3 + 34 + 528 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1491503345281) 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, 3095124 + ... + 3544403.

It is an arithmetic number, because the mean of its divisors is an integer number (22221670275).

Almost surely, 2^{1491503345280} is an apocalyptic number.

1491503345280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491503345280 is an abundant number, since it is smaller than the sum of its proper divisors (4197244245120).

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

1491503345280 is a wasteful number, since it uses less digits than its factorization.

1491503345280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639568 (or 6639550 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 1491503345280 in words is "one trillion, four hundred ninety-one billion, five hundred three million, three hundred forty-five thousand, two hundred eighty".