1311266154155 has 4 divisors (see below), whose sum is σ = 1573519384992. Its totient is φ = 1049012923320.

The previous prime is 1311266154097. The next prime is 1311266154157. The reversal of 1311266154155 is 5514516621131.

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

It is a de Polignac number, because none of the positive numbers 2^k-1311266154155 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311266154157) 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, 131126615411 + ... + 131126615420.

It is an arithmetic number, because the mean of its divisors is an integer number (393379846248).

Almost surely, 2^{1311266154155} is an apocalyptic number.

1311266154155 is a deficient number, since it is larger than the sum of its proper divisors (262253230837).

1311266154155 is an equidigital number, since it uses as much as digits as its factorization.

1311266154155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262253230836.

The product of its digits is 108000, while the sum is 41.

The spelling of 1311266154155 in words is "one trillion, three hundred eleven billion, two hundred sixty-six million, one hundred fifty-four thousand, one hundred fifty-five".