1349899499521 has 4 divisors (see below), whose sum is σ = 1429305352452. Its totient is φ = 1270493646592.

The previous prime is 1349899499503. The next prime is 1349899499563. The reversal of 1349899499521 is 1259949989431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 817145489521 + 532754010000 = 903961^2 + 729900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349899499521 - 2⁹ = 1349899499009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349899499581) 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 3 ways as a sum of consecutive naturals, for example, 39702926440 + ... + 39702926473.

It is an arithmetic number, because the mean of its divisors is an integer number (357326338113).

Almost surely, 2^{1349899499521} is an apocalyptic number.

It is an amenable number.

1349899499521 is a deficient number, since it is larger than the sum of its proper divisors (79405852931).

1349899499521 is an equidigital number, since it uses as much as digits as its factorization.

1349899499521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79405852930.

The product of its digits is 226748160, while the sum is 73.

The spelling of 1349899499521 in words is "one trillion, three hundred forty-nine billion, eight hundred ninety-nine million, four hundred ninety-nine thousand, five hundred twenty-one".