1491615317280 has 96 divisors (see below), whose sum is σ = 5125732653888. Its totient is φ = 361603712000.

The previous prime is 1491615317239. The next prime is 1491615317281. The reversal of 1491615317280 is 827135161941.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1491615317281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141246171 + ... + 141256730.

It is an arithmetic number, because the mean of its divisors is an integer number (53393048478).

It is a 1-persistent number, because it is pandigital, but 2⋅1491615317280 = 2983230634560 is not.

Almost surely, 2^{1491615317280} is an apocalyptic number.

1491615317280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491615317280 is an abundant number, since it is smaller than the sum of its proper divisors (3634117336608).

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

1491615317280 is a wasteful number, since it uses less digits than its factorization.

1491615317280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282502930 (or 282502922 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 1491615317280 in words is "one trillion, four hundred ninety-one billion, six hundred fifteen million, three hundred seventeen thousand, two hundred eighty".