1311640233450 has 48 divisors (see below), whose sum is σ = 3444212949120. Its totient is φ = 329195979520.

The previous prime is 1311640233427. The next prime is 1311640233499. The reversal of 1311640233450 is 543320461131.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257181810 + ... + 257186909.

It is an arithmetic number, because the mean of its divisors is an integer number (71754436440).

Almost surely, 2^{1311640233450} is an apocalyptic number.

1311640233450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311640233450 is an abundant number, since it is smaller than the sum of its proper divisors (2132572715670).

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

1311640233450 is a wasteful number, since it uses less digits than its factorization.

1311640233450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514368751 (or 514368746 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 1311640233450 its reverse (543320461131), we get a palindrome (1854960694581).

The spelling of 1311640233450 in words is "one trillion, three hundred eleven billion, six hundred forty million, two hundred thirty-three thousand, four hundred fifty".