72626161 has 2 divisors, whose sum is σ = 72626162. Its totient is φ = 72626160.

The previous prime is 72626137. The next prime is 72626209. The reversal of 72626161 is 16162627.

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., 56175025 + 16451136 = 7495^2 + 4056^2 .

It is a cyclic number.

It is not a de Polignac number, because 72626161 - 2⁷ = 72626033 is a prime.

It is equal to p_4263385 and since 72626161 and 4263385 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72626461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36313080 + 36313081.

It is an arithmetic number, because the mean of its divisors is an integer number (36313081).

Almost surely, 2^72626161 is an apocalyptic number.

It is an amenable number.

72626161 is a deficient number, since it is larger than the sum of its proper divisors (1).

72626161 is an equidigital number, since it uses as much as digits as its factorization.

72626161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 72626161 is about 8522.0983918282. The cubic root of 72626161 is about 417.2192736750.

Adding to 72626161 its reverse (16162627), we get a palindrome (88788788).

The spelling of 72626161 in words is "seventy-two million, six hundred twenty-six thousand, one hundred sixty-one".