1311565503541 has 16 divisors (see below), whose sum is σ = 1408414272768. Its totient is φ = 1216908806400.

The previous prime is 1311565503529. The next prime is 1311565503587. The reversal of 1311565503541 is 1453055651131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311565503541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311565503494 and 1311565503503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311565503641) 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, 13691551 + ... + 13787011.

It is an arithmetic number, because the mean of its divisors is an integer number (88025892048).

Almost surely, 2^{1311565503541} is an apocalyptic number.

It is an amenable number.

1311565503541 is a deficient number, since it is larger than the sum of its proper divisors (96848769227).

1311565503541 is a wasteful number, since it uses less digits than its factorization.

1311565503541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106932.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 1311565503541 in words is "one trillion, three hundred eleven billion, five hundred sixty-five million, five hundred three thousand, five hundred forty-one".