5181345791 has 4 divisors (see below), whose sum is σ = 5218621800. Its totient is φ = 5144069784.

The previous prime is 5181345779. The next prime is 5181345803. The reversal of 5181345791 is 1975431815.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5181345779) and next prime (5181345803).

It is a cyclic number.

It is not a de Polignac number, because 5181345791 - 2²⁶ = 5114236927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181345761) 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, 18637796 + ... + 18638073.

It is an arithmetic number, because the mean of its divisors is an integer number (1304655450).

Almost surely, 2^5181345791 is an apocalyptic number.

5181345791 is a deficient number, since it is larger than the sum of its proper divisors (37276009).

5181345791 is a wasteful number, since it uses less digits than its factorization.

5181345791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37276008.

The product of its digits is 151200, while the sum is 44.

The square root of 5181345791 is about 71981.5656331536. The cubic root of 5181345791 is about 1730.4040611209.

The spelling of 5181345791 in words is "five billion, one hundred eighty-one million, three hundred forty-five thousand, seven hundred ninety-one".