72455579 has 8 divisors (see below), whose sum is σ = 82994400. Its totient is φ = 61963776.

The previous prime is 72455549. The next prime is 72455671. The reversal of 72455579 is 97555427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-72455579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72455519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8384 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (10374300).

Almost surely, 2^72455579 is an apocalyptic number.

72455579 is a deficient number, since it is larger than the sum of its proper divisors (10538821).

72455579 is a wasteful number, since it uses less digits than its factorization.

72455579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23509.

The product of its digits is 441000, while the sum is 44.

The square root of 72455579 is about 8512.0842923458. The cubic root of 72455579 is about 416.8923671780.

The spelling of 72455579 in words is "seventy-two million, four hundred fifty-five thousand, five hundred seventy-nine".