44787531889 has 2 divisors, whose sum is σ = 44787531890. Its totient is φ = 44787531888.

The previous prime is 44787531881. The next prime is 44787531923. The reversal of 44787531889 is 98813578744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43803141264 + 984390625 = 209292^2 + 31375^2 .

It is a cyclic number.

It is not a de Polignac number, because 44787531889 - 2³ = 44787531881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44787531889.

It is not a weakly prime, because it can be changed into another prime (44787531881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22393765944 + 22393765945.

It is an arithmetic number, because the mean of its divisors is an integer number (22393765945).

Almost surely, 2^44787531889 is an apocalyptic number.

It is an amenable number.

44787531889 is a deficient number, since it is larger than the sum of its proper divisors (1).

44787531889 is an equidigital number, since it uses as much as digits as its factorization.

44787531889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54190080, while the sum is 64.

The spelling of 44787531889 in words is "forty-four billion, seven hundred eighty-seven million, five hundred thirty-one thousand, eight hundred eighty-nine".