12517621444 has 6 divisors (see below), whose sum is σ = 21905837534. Its totient is φ = 6258810720.

The previous prime is 12517621433. The next prime is 12517621483. The reversal of 12517621444 is 44412671521.

It can be written as a sum of positive squares in only one way, i.e., 11826562500 + 691058944 = 108750^2 + 26288^2 .

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 as a sum of consecutive naturals, namely, 1564702677 + ... + 1564702684.

Almost surely, 2^12517621444 is an apocalyptic number.

It is an amenable number.

12517621444 is a deficient number, since it is larger than the sum of its proper divisors (9388216090).

12517621444 is a wasteful number, since it uses less digits than its factorization.

12517621444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129405365 (or 3129405363 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The spelling of 12517621444 in words is "twelve billion, five hundred seventeen million, six hundred twenty-one thousand, four hundred forty-four".