438400547811073 has 4 divisors (see below), whose sum is σ = 438402460473940. Its totient is φ = 438398635148208.

The previous prime is 438400547810969. The next prime is 438400547811097. The reversal of 438400547811073 is 370118745004834.

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 402909551776449 + 35490996034624 = 20072607^2 + 5957432^2 .

It is a cyclic number.

It is not a de Polignac number, because 438400547811073 - 2¹³ = 438400547802881 is a prime.

It is a super-2 number, since 2×438400547811073² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438400547811773) 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, 955987578 + ... + 956446051.

It is an arithmetic number, because the mean of its divisors is an integer number (109600615118485).

Almost surely, 2^{438400547811073} is an apocalyptic number.

It is an amenable number.

438400547811073 is a deficient number, since it is larger than the sum of its proper divisors (1912662867).

438400547811073 is a wasteful number, since it uses less digits than its factorization.

438400547811073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912662866.

The product of its (nonzero) digits is 9031680, while the sum is 55.

The spelling of 438400547811073 in words is "four hundred thirty-eight trillion, four hundred billion, five hundred forty-seven million, eight hundred eleven thousand, seventy-three".