1161584731212 has 12 divisors (see below), whose sum is σ = 2710364372856. Its totient is φ = 387194910400.

The previous prime is 1161584731133. The next prime is 1161584731213. The reversal of 1161584731212 is 2121374851611.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1161584731213) 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 3 ways as a sum of consecutive naturals, for example, 48399363789 + ... + 48399363812.

It is an arithmetic number, because the mean of its divisors is an integer number (225863697738).

Almost surely, 2^{1161584731212} is an apocalyptic number.

1161584731212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1161584731212 is an abundant number, since it is smaller than the sum of its proper divisors (1548779641644).

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

1161584731212 is a wasteful number, since it uses less digits than its factorization.

1161584731212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96798727608 (or 96798727606 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The spelling of 1161584731212 in words is "one trillion, one hundred sixty-one billion, five hundred eighty-four million, seven hundred thirty-one thousand, two hundred twelve".