72516061 has 4 divisors (see below), whose sum is σ = 72634972. Its totient is φ = 72397152.

The previous prime is 72516053. The next prime is 72516097. The reversal of 72516061 is 16061527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16061527 = 419 ⋅38333.

It can be written as a sum of positive squares in 2 ways, for example, as 792100 + 71723961 = 890^2 + 8469^2 .

It is a cyclic number.

It is not a de Polignac number, because 72516061 - 2³ = 72516053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72516461) 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, 58536 + ... + 59761.

It is an arithmetic number, because the mean of its divisors is an integer number (18158743).

Almost surely, 2^72516061 is an apocalyptic number.

It is an amenable number.

72516061 is a deficient number, since it is larger than the sum of its proper divisors (118911).

72516061 is a wasteful number, since it uses less digits than its factorization.

72516061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118910.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 72516061 is about 8515.6362651302. The cubic root of 72516061 is about 417.0083346524.

Adding to 72516061 its reverse (16061527), we get a palindrome (88577588).

The spelling of 72516061 in words is "seventy-two million, five hundred sixteen thousand, sixty-one".