72554855 has 4 divisors (see below), whose sum is σ = 87065832. Its totient is φ = 58043880.

The previous prime is 72554851. The next prime is 72554873. The reversal of 72554855 is 55845527.

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

It is not a de Polignac number, because 72554855 - 2² = 72554851 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 (72554851) 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 3 ways as a sum of consecutive naturals, for example, 7255481 + ... + 7255490.

It is an arithmetic number, because the mean of its divisors is an integer number (21766458).

Almost surely, 2^72554855 is an apocalyptic number.

72554855 is a deficient number, since it is larger than the sum of its proper divisors (14510977).

72554855 is a wasteful number, since it uses less digits than its factorization.

72554855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14510976.

The product of its digits is 280000, while the sum is 41.

The square root of 72554855 is about 8517.9137704018. The cubic root of 72554855 is about 417.0826838708.

The spelling of 72554855 in words is "seventy-two million, five hundred fifty-four thousand, eight hundred fifty-five".