39448740169 has 4 divisors (see below), whose sum is σ = 39449171844. Its totient is φ = 39448308496.

The previous prime is 39448740083. The next prime is 39448740229. The reversal of 39448740169 is 96104784493.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96104784493 = 23 ⋅4178468891.

It can be written as a sum of positive squares in 2 ways, for example, as 2733198400 + 36715541769 = 52280^2 + 191613^2 .

It is a cyclic number.

It is not a de Polignac number, because 39448740169 - 2⁷ = 39448740041 is a prime.

It is a super-2 number, since 2×39448740169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39448740469) 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, 18802 + ... + 281515.

It is an arithmetic number, because the mean of its divisors is an integer number (9862292961).

Almost surely, 2^39448740169 is an apocalyptic number.

It is an amenable number.

39448740169 is a deficient number, since it is larger than the sum of its proper divisors (431675).

39448740169 is a wasteful number, since it uses less digits than its factorization.

39448740169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431674.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 39448740169 in words is "thirty-nine billion, four hundred forty-eight million, seven hundred forty thousand, one hundred sixty-nine".