1213885951968 has 24 divisors (see below), whose sum is σ = 3186450624168. Its totient is φ = 404628650624.

The previous prime is 1213885951903. The next prime is 1213885951973. The reversal of 1213885951968 is 8691595883121.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 1213885951899 and 1213885951908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6322322571 + ... + 6322322762.

It is an arithmetic number, because the mean of its divisors is an integer number (132768776007).

Almost surely, 2^{1213885951968} is an apocalyptic number.

It is an amenable number.

1213885951968 is an abundant number, since it is smaller than the sum of its proper divisors (1972564672200).

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

1213885951968 is a wasteful number, since it uses less digits than its factorization.

1213885951968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12644645346 (or 12644645338 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 66.

The spelling of 1213885951968 in words is "one trillion, two hundred thirteen billion, eight hundred eighty-five million, nine hundred fifty-one thousand, nine hundred sixty-eight".