439145217857 has 4 divisors (see below), whose sum is σ = 462258124080. Its totient is φ = 416032311636.

The previous prime is 439145217853. The next prime is 439145217871. The reversal of 439145217857 is 758712541934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 439145217857 - 2² = 439145217853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439145217853) 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, 11556453083 + ... + 11556453120.

It is an arithmetic number, because the mean of its divisors is an integer number (115564531020).

Almost surely, 2^439145217857 is an apocalyptic number.

It is an amenable number.

439145217857 is a deficient number, since it is larger than the sum of its proper divisors (23112906223).

439145217857 is a wasteful number, since it uses less digits than its factorization.

439145217857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23112906222.

The product of its digits is 8467200, while the sum is 56.

The spelling of 439145217857 in words is "four hundred thirty-nine billion, one hundred forty-five million, two hundred seventeen thousand, eight hundred fifty-seven".