26671427644 has 12 divisors (see below), whose sum is σ = 46738680184. Its totient is φ = 13317519024.

The previous prime is 26671427617. The next prime is 26671427683. The reversal of 26671427644 is 44672417662.

It is a happy number.

It is a super-2 number, since 2×26671427644² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 4545402 + ... + 4551265.

Almost surely, 2^26671427644 is an apocalyptic number.

It is an amenable number.

26671427644 is a deficient number, since it is larger than the sum of its proper divisors (20067252540).

26671427644 is a wasteful number, since it uses less digits than its factorization.

26671427644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9097404 (or 9097402 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 49.

The spelling of 26671427644 in words is "twenty-six billion, six hundred seventy-one million, four hundred twenty-seven thousand, six hundred forty-four".