72057755 has 16 divisors (see below), whose sum is σ = 107806464. Its totient is φ = 44918880.

The previous prime is 72057749. The next prime is 72057757. The reversal of 72057755 is 55775027.

It is a happy number.

It is not a de Polignac number, because 72057755 - 2⁶ = 72057691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72057757) 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 15 ways as a sum of consecutive naturals, for example, 93197 + ... + 93966.

It is an arithmetic number, because the mean of its divisors is an integer number (6737904).

Almost surely, 2^72057755 is an apocalyptic number.

72057755 is a deficient number, since it is larger than the sum of its proper divisors (35748709).

72057755 is a wasteful number, since it uses less digits than its factorization.

72057755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187186.

The product of its (nonzero) digits is 85750, while the sum is 38.

The square root of 72057755 is about 8488.6839380436. The cubic root of 72057755 is about 416.1279712152.

The spelling of 72057755 in words is "seventy-two million, fifty-seven thousand, seven hundred fifty-five".