12601663444 has 12 divisors (see below), whose sum is σ = 22426689600. Its totient is φ = 6194037848.

The previous prime is 12601663427. The next prime is 12601663489. The reversal of 12601663444 is 44436610621.

It is a super-2 number, since 2×12601663444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26698204 + ... + 26698675.

It is an arithmetic number, because the mean of its divisors is an integer number (1868890800).

Almost surely, 2^12601663444 is an apocalyptic number.

It is an amenable number.

12601663444 is a deficient number, since it is larger than the sum of its proper divisors (9825026156).

12601663444 is a wasteful number, since it uses less digits than its factorization.

12601663444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53396942 (or 53396940 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 12601663444 in words is "twelve billion, six hundred one million, six hundred sixty-three thousand, four hundred forty-four".