3738557988217 has 4 divisors (see below), whose sum is σ = 4026139371940. Its totient is φ = 3450976604496.

The previous prime is 3738557988203. The next prime is 3738557988239. The reversal of 3738557988217 is 7128897558373.

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 1303572511081 + 2434985477136 = 1141741^2 + 1560444^2 .

It is a cyclic number.

It is not a de Polignac number, because 3738557988217 - 2³⁹ = 3188802174329 is a prime.

It is a super-2 number, since 2×3738557988217² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3738557988217.

It is not an unprimeable number, because it can be changed into a prime (3738557980217) 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, 143790691842 + ... + 143790691867.

It is an arithmetic number, because the mean of its divisors is an integer number (1006534842985).

Almost surely, 2^{3738557988217} is an apocalyptic number.

It is an amenable number.

3738557988217 is a deficient number, since it is larger than the sum of its proper divisors (287581383723).

3738557988217 is a wasteful number, since it uses less digits than its factorization.

3738557988217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287581383722.

The product of its digits is 711244800, while the sum is 73.

The spelling of 3738557988217 in words is "three trillion, seven hundred thirty-eight billion, five hundred fifty-seven million, nine hundred eighty-eight thousand, two hundred seventeen".