1311423520144 has 10 divisors (see below), whose sum is σ = 2540883070310. Its totient is φ = 655711760064.

The previous prime is 1311423520133. The next prime is 1311423520219. The reversal of 1311423520144 is 4410253241131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1288197760144 + 23225760000 = 1134988^2 + 152400^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40981984989 + ... + 40981985020.

It is an arithmetic number, because the mean of its divisors is an integer number (254088307031).

Almost surely, 2^{1311423520144} is an apocalyptic number.

It is an amenable number.

1311423520144 is a deficient number, since it is larger than the sum of its proper divisors (1229459550166).

1311423520144 is an equidigital number, since it uses as much as digits as its factorization.

1311423520144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81963970017 (or 81963970011 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 1311423520144 its reverse (4410253241131), we get a palindrome (5721676761275).

The spelling of 1311423520144 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, five hundred twenty thousand, one hundred forty-four".