438620629565 has 16 divisors (see below), whose sum is σ = 549296591616. Its totient is φ = 335599017600.

The previous prime is 438620629561. The next prime is 438620629571. The reversal of 438620629565 is 565926026834.

It is not a de Polignac number, because 438620629565 - 2² = 438620629561 is a prime.

It is a super-4 number, since 4×438620629565⁴ (a number of 48 digits) contains 4444 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 438620629565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438620629561) 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 15 ways as a sum of consecutive naturals, for example, 726305 + ... + 1185225.

It is an arithmetic number, because the mean of its divisors is an integer number (34331036976).

Almost surely, 2^438620629565 is an apocalyptic number.

It is an amenable number.

438620629565 is a deficient number, since it is larger than the sum of its proper divisors (110675962051).

438620629565 is a wasteful number, since it uses less digits than its factorization.

438620629565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467260.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 438620629565 in words is "four hundred thirty-eight billion, six hundred twenty million, six hundred twenty-nine thousand, five hundred sixty-five".