1320949475491 has 8 divisors (see below), whose sum is σ = 1399490434080. Its totient is φ = 1242501633408.

The previous prime is 1320949475479. The next prime is 1320949475497. The reversal of 1320949475491 is 1945749490231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320949475491 - 2⁹ = 1320949474979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320949475497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23249911 + ... + 23306656.

It is an arithmetic number, because the mean of its divisors is an integer number (174936304260).

Almost surely, 2^{1320949475491} is an apocalyptic number.

1320949475491 is a deficient number, since it is larger than the sum of its proper divisors (78540958589).

1320949475491 is a wasteful number, since it uses less digits than its factorization.

1320949475491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46558253.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 1320949475491 in words is "one trillion, three hundred twenty billion, nine hundred forty-nine million, four hundred seventy-five thousand, four hundred ninety-one".