72655361 has 4 divisors (see below), whose sum is σ = 73118292. Its totient is φ = 72192432.

The previous prime is 72655339. The next prime is 72655369. The reversal of 72655361 is 16355627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7756225 + 64899136 = 2785^2 + 8056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72655361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72655369) 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, 231230 + ... + 231543.

It is an arithmetic number, because the mean of its divisors is an integer number (18279573).

Almost surely, 2^72655361 is an apocalyptic number.

It is an amenable number.

72655361 is a deficient number, since it is larger than the sum of its proper divisors (462931).

72655361 is a wasteful number, since it uses less digits than its factorization.

72655361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462930.

The product of its digits is 37800, while the sum is 35.

The square root of 72655361 is about 8523.8114127425. The cubic root of 72655361 is about 417.2751817676.

The spelling of 72655361 in words is "seventy-two million, six hundred fifty-five thousand, three hundred sixty-one".