84561026644 has 12 divisors (see below), whose sum is σ = 150008945044. Its totient is φ = 41701328064.

The previous prime is 84561026633. The next prime is 84561026677. The reversal of 84561026644 is 44662016548.

It can be written as a sum of positive squares in 2 ways, for example, as 40392960400 + 44168066244 = 200980^2 + 210162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 84561026594 and 84561026603.

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, 144795987 + ... + 144796570.

Almost surely, 2^84561026644 is an apocalyptic number.

It is an amenable number.

84561026644 is a deficient number, since it is larger than the sum of its proper divisors (65447918400).

84561026644 is a wasteful number, since it uses less digits than its factorization.

84561026644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289592634 (or 289592632 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 84561026644 in words is "eighty-four billion, five hundred sixty-one million, twenty-six thousand, six hundred forty-four".