7331729161 has 4 divisors (see below), whose sum is σ = 7434993024. Its totient is φ = 7228465300.

The previous prime is 7331729137. The next prime is 7331729219. The reversal of 7331729161 is 1619271337.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1619271337 = 1117 ⋅1449661.

It is a cyclic number.

It is not a de Polignac number, because 7331729161 - 2⁵ = 7331729129 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7331729261) 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, 51631825 + ... + 51631966.

It is an arithmetic number, because the mean of its divisors is an integer number (1858748256).

Almost surely, 2^7331729161 is an apocalyptic number.

7331729161 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7331729161 is a deficient number, since it is larger than the sum of its proper divisors (103263863).

7331729161 is a wasteful number, since it uses less digits than its factorization.

7331729161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103263862.

The product of its digits is 47628, while the sum is 40.

The square root of 7331729161 is about 85625.5169969794. The cubic root of 7331729161 is about 1942.6838858885.

The spelling of 7331729161 in words is "seven billion, three hundred thirty-one million, seven hundred twenty-nine thousand, one hundred sixty-one".