7181925161 has 2 divisors, whose sum is σ = 7181925162. Its totient is φ = 7181925160.

The previous prime is 7181925133. The next prime is 7181925239. The reversal of 7181925161 is 1615291817.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5317326400 + 1864598761 = 72920^2 + 43181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7181925161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7181925131) by changing a digit.

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 as a sum of consecutive naturals, namely, 3590962580 + 3590962581.

It is an arithmetic number, because the mean of its divisors is an integer number (3590962581).

Almost surely, 2^7181925161 is an apocalyptic number.

It is an amenable number.

7181925161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7181925161 is an equidigital number, since it uses as much as digits as its factorization.

7181925161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 41.

The square root of 7181925161 is about 84746.2398044893. The cubic root of 7181925161 is about 1929.3615758222.

The spelling of 7181925161 in words is "seven billion, one hundred eighty-one million, nine hundred twenty-five thousand, one hundred sixty-one".