1311513666050 has 48 divisors (see below), whose sum is σ = 2804018513472. Its totient is φ = 447062606400.

The previous prime is 1311513666037. The next prime is 1311513666059. The reversal of 1311513666050 is 506663151131.

It is a junction number, because it is equal to n+sod(n) for n = 1311513665995 and 1311513666013.

It is not an unprimeable number, because it can be changed into a prime (1311513666059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10769456 + ... + 10890555.

It is an arithmetic number, because the mean of its divisors is an integer number (58417052364).

Almost surely, 2^{1311513666050} is an apocalyptic number.

1311513666050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311513666050 is an abundant number, since it is smaller than the sum of its proper divisors (1492504847422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311513666050 is a wasteful number, since it uses less digits than its factorization.

1311513666050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21660203 (or 21660198 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 38.

The spelling of 1311513666050 in words is "one trillion, three hundred eleven billion, five hundred thirteen million, six hundred sixty-six thousand, fifty".