7289915161 has 3 divisors (see below), whose sum is σ = 7290000543. Its totient is φ = 7289829780.

The previous prime is 7289915111. The next prime is 7289915167. The reversal of 7289915161 is 1615199827.

The square root of 7289915161 is 85381.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 582305161 + 6707610000 = 24131^2 + 81900^2 .

It is not a de Polignac number, because 7289915161 - 2¹⁵ = 7289882393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7289915167) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 42691 + ... + 128071.

It is an arithmetic number, because the mean of its divisors is an integer number (2430000181).

Almost surely, 2^7289915161 is an apocalyptic number.

7289915161 is the 85381-st square number.

7289915161 is the 42691-st centered octagonal number.

It is an amenable number.

7289915161 is a deficient number, since it is larger than the sum of its proper divisors (85382).

7289915161 is an frugal number, since it uses more digits than its factorization.

7289915161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170762 (or 85381 counting only the distinct ones).

The product of its digits is 272160, while the sum is 49.

The cubic root of 7289915161 is about 1938.9836991853.

Multiplying 7289915161 by its sum of digits (49), we get a square (357205842889 = 597667²).

The spelling of 7289915161 in words is "seven billion, two hundred eighty-nine million, nine hundred fifteen thousand, one hundred sixty-one".