72382778285 has 8 divisors (see below), whose sum is σ = 89206883736. Its totient is φ = 56341189440.

The previous prime is 72382778269. The next prime is 72382778287. The reversal of 72382778285 is 58287728327.

It can be written as a sum of positive squares in 4 ways, for example, as 24950729764 + 47432048521 = 157958^2 + 217789^2 .

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

It is not a de Polignac number, because 72382778285 - 2⁴ = 72382778269 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 (72382778287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195628946 + ... + 195629315.

It is an arithmetic number, because the mean of its divisors is an integer number (11150860467).

Almost surely, 2^72382778285 is an apocalyptic number.

It is an amenable number.

72382778285 is a deficient number, since it is larger than the sum of its proper divisors (16824105451).

72382778285 is a wasteful number, since it uses less digits than its factorization.

72382778285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391258303.

The product of its digits is 21073920, while the sum is 59.

The spelling of 72382778285 in words is "seventy-two billion, three hundred eighty-two million, seven hundred seventy-eight thousand, two hundred eighty-five".