12055991634 has 24 divisors (see below), whose sum is σ = 26217714432. Its totient is φ = 4003833240.

The previous prime is 12055991599. The next prime is 12055991653. The reversal of 12055991634 is 43619955021.

12055991634 is a `hidden beast` number, since 1 + 2 + 0 + 5 + 5 + 9 + 9 + 1 + 634 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 12055991634.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1230874 + ... + 1240629.

It is an arithmetic number, because the mean of its divisors is an integer number (1092404768).

Almost surely, 2^12055991634 is an apocalyptic number.

12055991634 is an abundant number, since it is smaller than the sum of its proper divisors (14161722798).

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

12055991634 is a wasteful number, since it uses less digits than its factorization.

12055991634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471782 (or 2471779 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 12055991634 in words is "twelve billion, fifty-five million, nine hundred ninety-one thousand, six hundred thirty-four".