11969397649512 has 160 divisors (see below), whose sum is σ = 34247608686720. Its totient is φ = 3903894144000.

The previous prime is 11969397649477. The next prime is 11969397649541. The reversal of 11969397649512 is 21594679396911.

11969397649512 is a `hidden beast` number, since 1 + 1 + 9 + 6 + 9 + 39 + 76 + 4 + 9 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 121805343 + ... + 121903569.

It is an arithmetic number, because the mean of its divisors is an integer number (214047554292).

Almost surely, 2^{11969397649512} is an apocalyptic number.

11969397649512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11969397649512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17123804343360).

11969397649512 is an abundant number, since it is smaller than the sum of its proper divisors (22278211037208).

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

11969397649512 is a wasteful number, since it uses less digits than its factorization.

11969397649512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102293 (or 102280 counting only the distinct ones).

The product of its digits is 198404640, while the sum is 72.

The spelling of 11969397649512 in words is "eleven trillion, nine hundred sixty-nine billion, three hundred ninety-seven million, six hundred forty-nine thousand, five hundred twelve".