83117710128787 has 8 divisors (see below), whose sum is σ = 83894938925616. Its totient is φ = 82340489253792.

The previous prime is 83117710128769. The next prime is 83117710128793. The reversal of 83117710128787 is 78782101771138.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83117710128787 is a prime.

It is a super-2 number, since 2×83117710128787² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83117710128727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20264893 + ... + 24018769.

It is an arithmetic number, because the mean of its divisors is an integer number (10486867365702).

Almost surely, 2^{83117710128787} is an apocalyptic number.

83117710128787 is a deficient number, since it is larger than the sum of its proper divisors (777228796829).

83117710128787 is a wasteful number, since it uses less digits than its factorization.

83117710128787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960917.

The product of its (nonzero) digits is 7375872, while the sum is 61.

The spelling of 83117710128787 in words is "eighty-three trillion, one hundred seventeen billion, seven hundred ten million, one hundred twenty-eight thousand, seven hundred eighty-seven".