738138371765 has 4 divisors (see below), whose sum is σ = 885766046124. Its totient is φ = 590510697408.

The previous prime is 738138371759. The next prime is 738138371767. The reversal of 738138371765 is 567173831837.

It is a happy number.

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 310372666321 + 427765705444 = 557111^2 + 654038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738138371765 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 (738138371767) 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, 73813837172 + ... + 73813837181.

It is an arithmetic number, because the mean of its divisors is an integer number (221441511531).

Almost surely, 2^738138371765 is an apocalyptic number.

It is an amenable number.

738138371765 is a deficient number, since it is larger than the sum of its proper divisors (147627674359).

738138371765 is a wasteful number, since it uses less digits than its factorization.

738138371765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147627674358.

The product of its digits is 17781120, while the sum is 59.

The spelling of 738138371765 in words is "seven hundred thirty-eight billion, one hundred thirty-eight million, three hundred seventy-one thousand, seven hundred sixty-five".