44478971989 has 8 divisors (see below), whose sum is σ = 47535527808. Its totient is φ = 41471321280.

The previous prime is 44478971959. The next prime is 44478971993. The reversal of 44478971989 is 98917987444.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44478971989 - 2¹³ = 44478963797 is a prime.

It is a super-2 number, since 2×44478971989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44478971909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12224397 + ... + 12228034.

It is an arithmetic number, because the mean of its divisors is an integer number (5941940976).

Almost surely, 2^44478971989 is an apocalyptic number.

It is an amenable number.

44478971989 is a deficient number, since it is larger than the sum of its proper divisors (3056555819).

44478971989 is a wasteful number, since it uses less digits than its factorization.

44478971989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24452555.

The product of its digits is 146313216, while the sum is 70.

The spelling of 44478971989 in words is "forty-four billion, four hundred seventy-eight million, nine hundred seventy-one thousand, nine hundred eighty-nine".