5161728394 has 8 divisors (see below), whose sum is σ = 8198039268. Its totient is φ = 2429048640.

The previous prime is 5161728367. The next prime is 5161728421. The reversal of 5161728394 is 4938271615.

It is an interprime number because it is at equal distance from previous prime (5161728367) and next prime (5161728421).

It can be written as a sum of positive squares in 2 ways, for example, as 5110391169 + 51337225 = 71487^2 + 7165^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75907737 + ... + 75907804.

Almost surely, 2^5161728394 is an apocalyptic number.

5161728394 is a deficient number, since it is larger than the sum of its proper divisors (3036310874).

5161728394 is a wasteful number, since it uses less digits than its factorization.

5161728394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151815560.

The product of its digits is 362880, while the sum is 46.

The square root of 5161728394 is about 71845.1695940653. The cubic root of 5161728394 is about 1728.2174377463.

The spelling of 5161728394 in words is "five billion, one hundred sixty-one million, seven hundred twenty-eight thousand, three hundred ninety-four".