72758158985 has 8 divisors (see below), whose sum is σ = 92445660936. Its totient is φ = 54782613760.

The previous prime is 72758158937. The next prime is 72758159021. The reversal of 72758158985 is 58985185727.

It can be written as a sum of positive squares in 4 ways, for example, as 5339517184 + 67418641801 = 73072^2 + 259651^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-72758158985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427989086 + ... + 427989255.

It is an arithmetic number, because the mean of its divisors is an integer number (11555707617).

Almost surely, 2^72758158985 is an apocalyptic number.

It is an amenable number.

72758158985 is a deficient number, since it is larger than the sum of its proper divisors (19687501951).

72758158985 is a wasteful number, since it uses less digits than its factorization.

72758158985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855978363.

The product of its digits is 56448000, while the sum is 65.

The spelling of 72758158985 in words is "seventy-two billion, seven hundred fifty-eight million, one hundred fifty-eight thousand, nine hundred eighty-five".