26983431644 has 18 divisors (see below), whose sum is σ = 51132805920. Its totient is φ = 12453891216.

The previous prime is 26983431619. The next prime is 26983431659. The reversal of 26983431644 is 44613438962.

It is a junction number, because it is equal to n+sod(n) for n = 26983431592 and 26983431601.

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 5 ways as a sum of consecutive naturals, for example, 19957484 + ... + 19958835.

It is an arithmetic number, because the mean of its divisors is an integer number (2840711440).

Almost surely, 2^26983431644 is an apocalyptic number.

It is an amenable number.

26983431644 is a deficient number, since it is larger than the sum of its proper divisors (24149374276).

26983431644 is a wasteful number, since it uses less digits than its factorization.

26983431644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39916349 (or 39916334 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 50.

The spelling of 26983431644 in words is "twenty-six billion, nine hundred eighty-three million, four hundred thirty-one thousand, six hundred forty-four".