1311045163529 has 4 divisors (see below), whose sum is σ = 1388165467284. Its totient is φ = 1233924859776.

The previous prime is 1311045163523. The next prime is 1311045163531. The reversal of 1311045163529 is 9253615401131.

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 1165594459129 + 145450704400 = 1079627^2 + 381380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311045163529 - 2³² = 1306750196233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311045163523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38560151852 + ... + 38560151885.

It is an arithmetic number, because the mean of its divisors is an integer number (347041366821).

Almost surely, 2^{1311045163529} is an apocalyptic number.

It is an amenable number.

1311045163529 is a deficient number, since it is larger than the sum of its proper divisors (77120303755).

1311045163529 is an equidigital number, since it uses as much as digits as its factorization.

1311045163529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77120303754.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 1311045163529 in words is "one trillion, three hundred eleven billion, forty-five million, one hundred sixty-three thousand, five hundred twenty-nine".