72855055 has 48 divisors (see below), whose sum is σ = 110151360. Its totient is φ = 45287424.

The previous prime is 72855049. The next prime is 72855059. The reversal of 72855055 is 55055827.

It is not a de Polignac number, because 72855055 - 2⁹ = 72854543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72855059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644679 + ... + 644791.

It is an arithmetic number, because the mean of its divisors is an integer number (2294820).

Almost surely, 2^72855055 is an apocalyptic number.

72855055 is a deficient number, since it is larger than the sum of its proper divisors (37296305).

72855055 is a wasteful number, since it uses less digits than its factorization.

72855055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 72855055 is about 8535.5172661064. The cubic root of 72855055 is about 417.6571270838.

The spelling of 72855055 in words is "seventy-two million, eight hundred fifty-five thousand, fifty-five".