861356674244 has 24 divisors (see below), whose sum is σ = 1651231487136. Its totient is φ = 389901168000.

The previous prime is 861356674183. The next prime is 861356674259. The reversal of 861356674244 is 442476653168.

It is a self number, because there is not a number n which added to its sum of digits gives 861356674244.

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 7 ways as a sum of consecutive naturals, for example, 40604102 + ... + 40625309.

It is an arithmetic number, because the mean of its divisors is an integer number (68801311964).

Almost surely, 2^861356674244 is an apocalyptic number.

It is an amenable number.

861356674244 is a deficient number, since it is larger than the sum of its proper divisors (789874812892).

861356674244 is a wasteful number, since it uses less digits than its factorization.

861356674244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81229667 (or 81229665 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 56.

The spelling of 861356674244 in words is "eight hundred sixty-one billion, three hundred fifty-six million, six hundred seventy-four thousand, two hundred forty-four".