44394664464 has 80 divisors (see below), whose sum is σ = 127512394240. Its totient is φ = 14788552320.

The previous prime is 44394664429. The next prime is 44394664477. The reversal of 44394664464 is 46446649344.

It is a super-2 number, since 2×44394664464² (a number of 22 digits) contains 22 as substring.

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 a self number, because there is not a number n which added to its sum of digits gives 44394664464.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644154 + ... + 709734.

It is an arithmetic number, because the mean of its divisors is an integer number (1593904928).

Almost surely, 2^44394664464 is an apocalyptic number.

It is an amenable number.

44394664464 is an abundant number, since it is smaller than the sum of its proper divisors (83117729776).

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

44394664464 is a wasteful number, since it uses less digits than its factorization.

44394664464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67165 (or 67153 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 54.

The spelling of 44394664464 in words is "forty-four billion, three hundred ninety-four million, six hundred sixty-four thousand, four hundred sixty-four".