72144755 has 8 divisors (see below), whose sum is σ = 88587312. Its totient is φ = 56373408.

The previous prime is 72144739. The next prime is 72144769. The reversal of 72144755 is 55744127.

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

It is a cyclic number.

It is not a de Polignac number, because 72144755 - 2⁴ = 72144739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167564 + ... + 167993.

It is an arithmetic number, because the mean of its divisors is an integer number (11073414).

Almost surely, 2^72144755 is an apocalyptic number.

72144755 is a deficient number, since it is larger than the sum of its proper divisors (16442557).

72144755 is a wasteful number, since it uses less digits than its factorization.

72144755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335605.

The product of its digits is 39200, while the sum is 35.

The square root of 72144755 is about 8493.8068614727. The cubic root of 72144755 is about 416.2953766209.

The spelling of 72144755 in words is "seventy-two million, one hundred forty-four thousand, seven hundred fifty-five".