44972027891 has 16 divisors (see below), whose sum is σ = 51784830720. Its totient is φ = 38256481440.

The previous prime is 44972027869. The next prime is 44972027909. The reversal of 44972027891 is 19872027944.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 44972027891 - 2²⁶ = 44904919027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44972027861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3477860 + ... + 3490766.

It is an arithmetic number, because the mean of its divisors is an integer number (3236551920).

Almost surely, 2^44972027891 is an apocalyptic number.

44972027891 is a deficient number, since it is larger than the sum of its proper divisors (6812802829).

44972027891 is a wasteful number, since it uses less digits than its factorization.

44972027891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16634.

The product of its (nonzero) digits is 2032128, while the sum is 53.

Adding to 44972027891 its sum of digits (53), we get a palindrome (44972027944).

The spelling of 44972027891 in words is "forty-four billion, nine hundred seventy-two million, twenty-seven thousand, eight hundred ninety-one".