44645777789 has 4 divisors (see below), whose sum is σ = 44647669020. Its totient is φ = 44643886560.

The previous prime is 44645777783. The next prime is 44645777809. The reversal of 44645777789 is 98777754644.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25744202500 + 18901575289 = 160450^2 + 137483^2 .

It is a cyclic number.

It is not a de Polignac number, because 44645777789 - 2²⁸ = 44377342333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44645777783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909752 + ... + 957569.

It is an arithmetic number, because the mean of its divisors is an integer number (11161917255).

Almost surely, 2^44645777789 is an apocalyptic number.

It is an amenable number.

44645777789 is a deficient number, since it is larger than the sum of its proper divisors (1891231).

44645777789 is a wasteful number, since it uses less digits than its factorization.

44645777789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891230.

The product of its digits is 331914240, while the sum is 68.

The spelling of 44645777789 in words is "forty-four billion, six hundred forty-five million, seven hundred seventy-seven thousand, seven hundred eighty-nine".