438734015999 has 4 divisors (see below), whose sum is σ = 438803984640. Its totient is φ = 438664047360.

The previous prime is 438734015987. The next prime is 438734016047. The reversal of 438734015999 is 999510437834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 438734015999 - 2²⁰ = 438732967423 is a prime.

It is a super-2 number, since 2×438734015999² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438734015399) 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, 34974914 + ... + 34987455.

It is an arithmetic number, because the mean of its divisors is an integer number (109700996160).

Almost surely, 2^438734015999 is an apocalyptic number.

438734015999 is a deficient number, since it is larger than the sum of its proper divisors (69968641).

438734015999 is an equidigital number, since it uses as much as digits as its factorization.

438734015999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69968640.

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 438734015999 in words is "four hundred thirty-eight billion, seven hundred thirty-four million, fifteen thousand, nine hundred ninety-nine".