5091861305 has 8 divisors (see below), whose sum is σ = 6115539912. Its totient is φ = 4069951488.

The previous prime is 5091861287. The next prime is 5091861317. The reversal of 5091861305 is 5031681905.

It can be written as a sum of positive squares in 4 ways, for example, as 263835049 + 4828026256 = 16243^2 + 69484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5091861305 - 2⁶ = 5091861241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435854 + ... + 447383.

It is an arithmetic number, because the mean of its divisors is an integer number (764442489).

Almost surely, 2^5091861305 is an apocalyptic number.

It is an amenable number.

5091861305 is a deficient number, since it is larger than the sum of its proper divisors (1023678607).

5091861305 is a wasteful number, since it uses less digits than its factorization.

5091861305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884395.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 5091861305 is about 71357.2792712839. The cubic root of 5091861305 is about 1720.3845031182.

The spelling of 5091861305 in words is "five billion, ninety-one million, eight hundred sixty-one thousand, three hundred five".