44646664644 has 96 divisors (see below), whose sum is σ = 118988822400. Its totient is φ = 14466625920.

The previous prime is 44646664633. The next prime is 44646664649.

44646664644 is nontrivially palindromic in base 10.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (44646664649) 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, 4906539 + ... + 4915629.

It is an arithmetic number, because the mean of its divisors is an integer number (1239466900).

Almost surely, 2^44646664644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44646664644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59494411200).

44646664644 is an abundant number, since it is smaller than the sum of its proper divisors (74342157756).

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

44646664644 is a wasteful number, since it uses less digits than its factorization.

44646664644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370 (or 10362 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 54.

The spelling of 44646664644 in words is "forty-four billion, six hundred forty-six million, six hundred sixty-four thousand, six hundred forty-four".