1311864456998 has 16 divisors (see below), whose sum is σ = 2011330486656. Its totient is φ = 641500042560.

The previous prime is 1311864456997. The next prime is 1311864457039. The reversal of 1311864456998 is 8996544681131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311864456997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19736918 + ... + 19803273.

It is an arithmetic number, because the mean of its divisors is an integer number (125708155416).

Almost surely, 2^{1311864456998} is an apocalyptic number.

1311864456998 is a deficient number, since it is larger than the sum of its proper divisors (699466029658).

1311864456998 is a wasteful number, since it uses less digits than its factorization.

1311864456998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39540559.

The product of its digits is 44789760, while the sum is 65.

The spelling of 1311864456998 in words is "one trillion, three hundred eleven billion, eight hundred sixty-four million, four hundred fifty-six thousand, nine hundred ninety-eight".