44978894391 has 8 divisors (see below), whose sum is σ = 61247856384. Its totient is φ = 29347931000.

The previous prime is 44978894333. The next prime is 44978894413. The reversal of 44978894391 is 19349887944.

It is a happy number.

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 44978894391 - 2³⁰ = 43905152567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44938894391) 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, 159499485 + ... + 159499766.

It is an arithmetic number, because the mean of its divisors is an integer number (7655982048).

Almost surely, 2^44978894391 is an apocalyptic number.

44978894391 is a deficient number, since it is larger than the sum of its proper divisors (16268961993).

44978894391 is a wasteful number, since it uses less digits than its factorization.

44978894391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318999301.

The product of its digits is 62705664, while the sum is 66.

The spelling of 44978894391 in words is "forty-four billion, nine hundred seventy-eight million, eight hundred ninety-four thousand, three hundred ninety-one".