5438779526381 has 4 divisors (see below), whose sum is σ = 5614224027264. Its totient is φ = 5263335025500.

The previous prime is 5438779526363. The next prime is 5438779526423. The reversal of 5438779526381 is 1836259778345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5438779526381 - 2³⁴ = 5421599657197 is a prime.

It is a super-2 number, since 2×5438779526381² (a number of 26 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 (5438779526321) 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, 87722250395 + ... + 87722250456.

It is an arithmetic number, because the mean of its divisors is an integer number (1403556006816).

Almost surely, 2^{5438779526381} is an apocalyptic number.

It is an amenable number.

5438779526381 is a deficient number, since it is larger than the sum of its proper divisors (175444500883).

5438779526381 is a wasteful number, since it uses less digits than its factorization.

5438779526381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175444500882.

The product of its digits is 304819200, while the sum is 68.

The spelling of 5438779526381 in words is "five trillion, four hundred thirty-eight billion, seven hundred seventy-nine million, five hundred twenty-six thousand, three hundred eighty-one".