72810555 has 8 divisors (see below), whose sum is σ = 116496912. Its totient is φ = 38832288.

The previous prime is 72810553. The next prime is 72810559. The reversal of 72810555 is 55501827.

It is a happy number.

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

It is not a de Polignac number, because 72810555 - 2¹ = 72810553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72810553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2427004 + ... + 2427033.

It is an arithmetic number, because the mean of its divisors is an integer number (14562114).

Almost surely, 2^72810555 is an apocalyptic number.

72810555 is a deficient number, since it is larger than the sum of its proper divisors (43686357).

72810555 is a wasteful number, since it uses less digits than its factorization.

72810555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854045.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 72810555 is about 8532.9101132029. The cubic root of 72810555 is about 417.5720745206.

The spelling of 72810555 in words is "seventy-two million, eight hundred ten thousand, five hundred fifty-five".