44644668426 has 80 divisors (see below), whose sum is σ = 101311194600. Its totient is φ = 14693000832.

The previous prime is 44644668421. The next prime is 44644668451. The reversal of 44644668426 is 62486644644.

44644668426 is a `hidden beast` number, since 44 + 64 + 466 + 84 + 2 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 43932579201 + 712089225 = 209601^2 + 26685^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (44644668421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5169480 + ... + 5178108.

Almost surely, 2^44644668426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44644668426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50655597300).

44644668426 is an abundant number, since it is smaller than the sum of its proper divisors (56666526174).

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

44644668426 is a wasteful number, since it uses less digits than its factorization.

44644668426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045 (or 9036 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 54.

The spelling of 44644668426 in words is "forty-four billion, six hundred forty-four million, six hundred sixty-eight thousand, four hundred twenty-six".