12571621646 has 16 divisors (see below), whose sum is σ = 19383462864. Its totient is φ = 6110754624.

The previous prime is 12571621633. The next prime is 12571621651. The reversal of 12571621646 is 64612617521.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 17081 + ... + 159483.

It is an arithmetic number, because the mean of its divisors is an integer number (1211466429).

Almost surely, 2^12571621646 is an apocalyptic number.

12571621646 is a deficient number, since it is larger than the sum of its proper divisors (6811841218).

12571621646 is a wasteful number, since it uses less digits than its factorization.

12571621646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143635.

The product of its digits is 120960, while the sum is 41.

The spelling of 12571621646 in words is "twelve billion, five hundred seventy-one million, six hundred twenty-one thousand, six hundred forty-six".