5181408323 has 24 divisors (see below), whose sum is σ = 6548528448. Its totient is φ = 4063239936.

The previous prime is 5181408307. The next prime is 5181408343. The reversal of 5181408323 is 3238041815.

It is a happy number.

It is a Cunningham number, because it is equal to 71982²-1.

It is not a de Polignac number, because 5181408323 - 2⁴ = 5181408307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5181408343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35990 + ... + 107972.

It is an arithmetic number, because the mean of its divisors is an integer number (272855352).

Almost surely, 2^5181408323 is an apocalyptic number.

5181408323 is a deficient number, since it is larger than the sum of its proper divisors (1367120125).

5181408323 is a wasteful number, since it uses less digits than its factorization.

5181408323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72123 (or 72116 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 5181408323 is about 71981.9999930538. Note that the first 5 decimals coincide. The cubic root of 5181408323 is about 1730.4110223234.

The spelling of 5181408323 in words is "five billion, one hundred eighty-one million, four hundred eight thousand, three hundred twenty-three".