72180863 has 8 divisors (see below), whose sum is σ = 72769536. Its totient is φ = 71595000.

The previous prime is 72180853. The next prime is 72180883. The reversal of 72180863 is 36808127.

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 72180863 - 2⁴ = 72180847 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 (72180853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95738 + ... + 96488.

It is an arithmetic number, because the mean of its divisors is an integer number (9096192).

Almost surely, 2^72180863 is an apocalyptic number.

72180863 is a deficient number, since it is larger than the sum of its proper divisors (588673).

72180863 is a wasteful number, since it uses less digits than its factorization.

72180863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 72180863 is about 8495.9321442676. The cubic root of 72180863 is about 416.3648161176.

The spelling of 72180863 in words is "seventy-two million, one hundred eighty thousand, eight hundred sixty-three".