44138856709257 has 8 divisors (see below), whose sum is σ = 58885768449984. Its totient is φ = 29408924720688.

The previous prime is 44138856709237. The next prime is 44138856709291. The reversal of 44138856709257 is 75290765883144.

44138856709257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 44138856709257 - 2⁸ = 44138856709001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44138856709191 and 44138856709200.

It is not an unprimeable number, because it can be changed into a prime (44138856709237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4244931973 + ... + 4244942370.

It is an arithmetic number, because the mean of its divisors is an integer number (7360721056248).

It is a 1-persistent number, because it is pandigital, but 2⋅44138856709257 = 88277713418514 is not.

Almost surely, 2^{44138856709257} is an apocalyptic number.

It is an amenable number.

44138856709257 is a deficient number, since it is larger than the sum of its proper divisors (14746911740727).

44138856709257 is a wasteful number, since it uses less digits than its factorization.

44138856709257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489876079.

The product of its (nonzero) digits is 406425600, while the sum is 69.

The spelling of 44138856709257 in words is "forty-four trillion, one hundred thirty-eight billion, eight hundred fifty-six million, seven hundred nine thousand, two hundred fifty-seven".