72652161 has 4 divisors (see below), whose sum is σ = 96869552. Its totient is φ = 48434772.

The previous prime is 72652157. The next prime is 72652171. The reversal of 72652161 is 16125627.

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.

It is not a de Polignac number, because 72652161 - 2² = 72652157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72652171) 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, 12108691 + ... + 12108696.

It is an arithmetic number, because the mean of its divisors is an integer number (24217388).

Almost surely, 2^72652161 is an apocalyptic number.

It is an amenable number.

72652161 is a deficient number, since it is larger than the sum of its proper divisors (24217391).

72652161 is a wasteful number, since it uses less digits than its factorization.

72652161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24217390.

The product of its digits is 5040, while the sum is 30.

The square root of 72652161 is about 8523.6237012200. The cubic root of 72652161 is about 417.2690555843.

Adding to 72652161 its reverse (16125627), we get a palindrome (88777788).

The spelling of 72652161 in words is "seventy-two million, six hundred fifty-two thousand, one hundred sixty-one".