1311512300545 has 8 divisors (see below), whose sum is σ = 1666392099624. Its totient is φ = 987491614464.

The previous prime is 1311512300513. The next prime is 1311512300621. The reversal of 1311512300545 is 5450032151131.

It can be written as a sum of positive squares in 4 ways, for example, as 248914181569 + 1062598118976 = 498913^2 + 1030824^2 .

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 1311512300545 - 2⁵ = 1311512300513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7714778154 + ... + 7714778323.

It is an arithmetic number, because the mean of its divisors is an integer number (208299012453).

Almost surely, 2^{1311512300545} is an apocalyptic number.

It is an amenable number.

1311512300545 is a deficient number, since it is larger than the sum of its proper divisors (354879799079).

1311512300545 is a wasteful number, since it uses less digits than its factorization.

1311512300545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15429556499.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1311512300545 its reverse (5450032151131), we get a palindrome (6761544451676).

The spelling of 1311512300545 in words is "one trillion, three hundred eleven billion, five hundred twelve million, three hundred thousand, five hundred forty-five".