11973555432 has 160 divisors (see below), whose sum is σ = 35730525600. Its totient is φ = 3735248256.

The previous prime is 11973555431. The next prime is 11973555443. The reversal of 11973555432 is 23455537911.

11973555432 is a `hidden beast` number, since 1 + 1 + 97 + 3 + 5 + 554 + 3 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (11973555431) 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 39 ways as a sum of consecutive naturals, for example, 1016038 + ... + 1027754.

It is an arithmetic number, because the mean of its divisors is an integer number (223315785).

Almost surely, 2^11973555432 is an apocalyptic number.

11973555432 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 11973555432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17865262800).

11973555432 is an abundant number, since it is smaller than the sum of its proper divisors (23756970168).

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

11973555432 is a wasteful number, since it uses less digits than its factorization.

11973555432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11837 (or 11824 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The spelling of 11973555432 in words is "eleven billion, nine hundred seventy-three million, five hundred fifty-five thousand, four hundred thirty-two".