438126135184513 has 4 divisors (see below), whose sum is σ = 463898260783620. Its totient is φ = 412354009585408.

The previous prime is 438126135184483. The next prime is 438126135184531. The reversal of 438126135184513 is 315481531621834.

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 160471332681984 + 277654802502529 = 12667728^2 + 16662977^2 .

It is a cyclic number.

It is not a de Polignac number, because 438126135184513 - 2²¹ = 438126133087361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438126135184583) 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, 12886062799528 + ... + 12886062799561.

It is an arithmetic number, because the mean of its divisors is an integer number (115974565195905).

Almost surely, 2^{438126135184513} is an apocalyptic number.

It is an amenable number.

438126135184513 is a deficient number, since it is larger than the sum of its proper divisors (25772125599107).

438126135184513 is a wasteful number, since it uses less digits than its factorization.

438126135184513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25772125599106.

The product of its digits is 8294400, while the sum is 55.

The spelling of 438126135184513 in words is "four hundred thirty-eight trillion, one hundred twenty-six billion, one hundred thirty-five million, one hundred eighty-four thousand, five hundred thirteen".