5181306729 has 8 divisors (see below), whose sum is σ = 7095122880. Its totient is φ = 3360847536.

The previous prime is 5181306703. The next prime is 5181306731. The reversal of 5181306729 is 9276031815.

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

It is not a de Polignac number, because 5181306729 - 2¹⁶ = 5181241193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5181306769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23339109 + ... + 23339330.

It is an arithmetic number, because the mean of its divisors is an integer number (886890360).

Almost surely, 2^5181306729 is an apocalyptic number.

It is an amenable number.

5181306729 is a deficient number, since it is larger than the sum of its proper divisors (1913816151).

5181306729 is a wasteful number, since it uses less digits than its factorization.

5181306729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46678479.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 5181306729 is about 71981.2942992831. The cubic root of 5181306729 is about 1730.3997126231.

The spelling of 5181306729 in words is "five billion, one hundred eighty-one million, three hundred six thousand, seven hundred twenty-nine".