1311513215408 has 20 divisors (see below), whose sum is σ = 2772062023848. Its totient is φ = 596142370560.

The previous prime is 1311513215401. The next prime is 1311513215423. The reversal of 1311513215408 is 8045123151131.

It is not an unprimeable number, because it can be changed into a prime (1311513215401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3725889641 + ... + 3725889992.

Almost surely, 2^{1311513215408} is an apocalyptic number.

It is an amenable number.

1311513215408 is an abundant number, since it is smaller than the sum of its proper divisors (1460548808440).

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

1311513215408 is a wasteful number, since it uses less digits than its factorization.

1311513215408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451779652 (or 7451779646 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

Adding to 1311513215408 its reverse (8045123151131), we get a palindrome (9356636366539).

The spelling of 1311513215408 in words is "one trillion, three hundred eleven billion, five hundred thirteen million, two hundred fifteen thousand, four hundred eight".