5181456191 has 4 divisors (see below), whose sum is σ = 5181689352. Its totient is φ = 5181223032.

The previous prime is 5181456179. The next prime is 5181456193. The reversal of 5181456191 is 1916541815.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5181456191 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 (5181456193) 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, 79265 + ... + 129018.

It is an arithmetic number, because the mean of its divisors is an integer number (1295422338).

Almost surely, 2^5181456191 is an apocalyptic number.

5181456191 is a deficient number, since it is larger than the sum of its proper divisors (233161).

5181456191 is a wasteful number, since it uses less digits than its factorization.

5181456191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233160.

The product of its digits is 43200, while the sum is 41.

The square root of 5181456191 is about 71982.3324920775. The cubic root of 5181456191 is about 1730.4163510587.

The spelling of 5181456191 in words is "five billion, one hundred eighty-one million, four hundred fifty-six thousand, one hundred ninety-one".