5811641278 has 4 divisors (see below), whose sum is σ = 8717461920. Its totient is φ = 2905820638.

The previous prime is 5811641263. The next prime is 5811641279. The reversal of 5811641278 is 8721461185.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5811641279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452910318 + ... + 1452910321.

It is an arithmetic number, because the mean of its divisors is an integer number (2179365480).

Almost surely, 2^5811641278 is an apocalyptic number.

5811641278 is a deficient number, since it is larger than the sum of its proper divisors (2905820642).

5811641278 is a wasteful number, since it uses less digits than its factorization.

5811641278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905820641.

The product of its digits is 107520, while the sum is 43.

The square root of 5811641278 is about 76234.1214811321. The cubic root of 5811641278 is about 1797.9030393110.

The spelling of 5811641278 in words is "five billion, eight hundred eleven million, six hundred forty-one thousand, two hundred seventy-eight".