12051561147 has 16 divisors (see below), whose sum is σ = 16590013440. Its totient is φ = 7773832800.

The previous prime is 12051561143. The next prime is 12051561199. The reversal of 12051561147 is 74116515021.

It is not a de Polignac number, because 12051561147 - 2² = 12051561143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12051561143) 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, 997372 + ... + 1009382.

It is an arithmetic number, because the mean of its divisors is an integer number (1036875840).

Almost surely, 2^12051561147 is an apocalyptic number.

12051561147 is a deficient number, since it is larger than the sum of its proper divisors (4538452293).

12051561147 is a wasteful number, since it uses less digits than its factorization.

12051561147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22834.

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 12051561147 in words is "twelve billion, fifty-one million, five hundred sixty-one thousand, one hundred forty-seven".