72781675 has 12 divisors (see below), whose sum is σ = 95558616. Its totient is φ = 54800000.

The previous prime is 72781669. The next prime is 72781679. The reversal of 72781675 is 57618727.

It is not a de Polignac number, because 72781675 - 2¹⁹ = 72257387 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (72781679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85201 + ... + 86050.

It is an arithmetic number, because the mean of its divisors is an integer number (7963218).

Almost surely, 2^72781675 is an apocalyptic number.

72781675 is a deficient number, since it is larger than the sum of its proper divisors (22776941).

72781675 is a wasteful number, since it uses less digits than its factorization.

72781675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171278 (or 171273 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The square root of 72781675 is about 8531.2176739314. The cubic root of 72781675 is about 417.5168578179.

The spelling of 72781675 in words is "seventy-two million, seven hundred eighty-one thousand, six hundred seventy-five".