1311615216345 has 16 divisors (see below), whose sum is σ = 2398382110080. Its totient is φ = 599595527424.

The previous prime is 1311615216323. The next prime is 1311615216347. The reversal of 1311615216345 is 5436125161131.

It is not a de Polignac number, because 1311615216345 - 2⁸ = 1311615216089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311615216347) 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, 6245786640 + ... + 6245786849.

It is an arithmetic number, because the mean of its divisors is an integer number (149898881880).

Almost surely, 2^{1311615216345} is an apocalyptic number.

1311615216345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311615216345 is a deficient number, since it is larger than the sum of its proper divisors (1086766893735).

1311615216345 is a wasteful number, since it uses less digits than its factorization.

1311615216345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491573504.

The product of its digits is 64800, while the sum is 39.

The spelling of 1311615216345 in words is "one trillion, three hundred eleven billion, six hundred fifteen million, two hundred sixteen thousand, three hundred forty-five".