1215775511612 has 48 divisors (see below), whose sum is σ = 2182322634912. Its totient is φ = 592441006080.

The previous prime is 1215775511611. The next prime is 1215775511647. The reversal of 1215775511612 is 2161155775121.

It is a super-2 number, since 2×1215775511612² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215775511611) 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 15 ways as a sum of consecutive naturals, for example, 128012048 + ... + 128021544.

It is an arithmetic number, because the mean of its divisors is an integer number (45465054894).

Almost surely, 2^{1215775511612} is an apocalyptic number.

It is an amenable number.

1215775511612 is a deficient number, since it is larger than the sum of its proper divisors (966547123300).

1215775511612 is a wasteful number, since it uses less digits than its factorization.

1215775511612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14318 (or 14316 counting only the distinct ones).

The product of its digits is 147000, while the sum is 44.

The spelling of 1215775511612 in words is "one trillion, two hundred fifteen billion, seven hundred seventy-five million, five hundred eleven thousand, six hundred twelve".