84717717771 has 16 divisors (see below), whose sum is σ = 119611543968. Its totient is φ = 53151744000.

The previous prime is 84717717743. The next prime is 84717717781. The reversal of 84717717771 is 17771771748.

It is not a de Polignac number, because 84717717771 - 2¹¹ = 84717715723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84717717781) 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, 605871 + ... + 732471.

It is an arithmetic number, because the mean of its divisors is an integer number (7475721498).

Almost surely, 2^84717717771 is an apocalyptic number.

84717717771 is a deficient number, since it is larger than the sum of its proper divisors (34893826197).

84717717771 is a wasteful number, since it uses less digits than its factorization.

84717717771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139742.

The product of its digits is 3764768, while the sum is 57.

The spelling of 84717717771 in words is "eighty-four billion, seven hundred seventeen million, seven hundred seventeen thousand, seven hundred seventy-one".