1311936485820 has 96 divisors (see below), whose sum is σ = 3994627710528. Its totient is φ = 320371126272.

The previous prime is 1311936485767. The next prime is 1311936485863. The reversal of 1311936485820 is 285846391131.

It is a super-2 number, since 2×1311936485820² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 17343507 + ... + 17418986.

It is an arithmetic number, because the mean of its divisors is an integer number (41610705318).

Almost surely, 2^{1311936485820} is an apocalyptic number.

1311936485820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311936485820 is an abundant number, since it is smaller than the sum of its proper divisors (2682691224708).

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

1311936485820 is a wasteful number, since it uses less digits than its factorization.

1311936485820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34762559 (or 34762557 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 1311936485820 in words is "one trillion, three hundred eleven billion, nine hundred thirty-six million, four hundred eighty-five thousand, eight hundred twenty".