5381918523 has 12 divisors (see below), whose sum is σ = 7777929120. Its totient is φ = 3586077936.

The previous prime is 5381918501. The next prime is 5381918533. The reversal of 5381918523 is 3258191835.

5381918523 is a `hidden beast` number, since 5 + 38 + 1 + 91 + 8 + 523 = 666.

It is not a de Polignac number, because 5381918523 - 2⁹ = 5381918011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5381918533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137283 + ... + 172076.

It is an arithmetic number, because the mean of its divisors is an integer number (648160760).

Almost surely, 2^5381918523 is an apocalyptic number.

5381918523 is a deficient number, since it is larger than the sum of its proper divisors (2396010597).

5381918523 is a wasteful number, since it uses less digits than its factorization.

5381918523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311298 (or 311295 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 5381918523 is about 73361.5602546729. The cubic root of 5381918523 is about 1752.4502843915.

The spelling of 5381918523 in words is "five billion, three hundred eighty-one million, nine hundred eighteen thousand, five hundred twenty-three".