72858887787 has 16 divisors (see below), whose sum is σ = 111299945472. Its totient is φ = 41529820800.

The previous prime is 72858887779. The next prime is 72858887791. The reversal of 72858887787 is 78778885827.

It is not a de Polignac number, because 72858887787 - 2³ = 72858887779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72858882787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4317603 + ... + 4334444.

It is an arithmetic number, because the mean of its divisors is an integer number (6956246592).

Almost surely, 2^72858887787 is an apocalyptic number.

72858887787 is a deficient number, since it is larger than the sum of its proper divisors (38441057685).

72858887787 is a wasteful number, since it uses less digits than its factorization.

72858887787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652458.

The product of its digits is 786759680, while the sum is 75.

The spelling of 72858887787 in words is "seventy-two billion, eight hundred fifty-eight million, eight hundred eighty-seven thousand, seven hundred eighty-seven".