861268408044 has 96 divisors (see below), whose sum is σ = 2321549911296. Its totient is φ = 245609441280.

The previous prime is 861268408043. The next prime is 861268408069. The reversal of 861268408044 is 440804862168.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (861268408043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25998139 + ... + 26031245.

It is an arithmetic number, because the mean of its divisors is an integer number (24182811576).

Almost surely, 2^861268408044 is an apocalyptic number.

It is an amenable number.

861268408044 is an abundant number, since it is smaller than the sum of its proper divisors (1460281503252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861268408044 is a wasteful number, since it uses less digits than its factorization.

861268408044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44735 (or 44733 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 51.

The spelling of 861268408044 in words is "eight hundred sixty-one billion, two hundred sixty-eight million, four hundred eight thousand, forty-four".