84940170681 has 32 divisors (see below), whose sum is σ = 119830036480. Its totient is φ = 53369798400.

The previous prime is 84940170673. The next prime is 84940170683. The reversal of 84940170681 is 18607104948.

It is not a de Polignac number, because 84940170681 - 2³ = 84940170673 is a prime.

It is a super-2 number, since 2×84940170681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84940170681.

It is not an unprimeable number, because it can be changed into a prime (84940170683) 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 31 ways as a sum of consecutive naturals, for example, 16907736 + ... + 16912758.

It is an arithmetic number, because the mean of its divisors is an integer number (3744688640).

Almost surely, 2^84940170681 is an apocalyptic number.

It is an amenable number.

84940170681 is a deficient number, since it is larger than the sum of its proper divisors (34889865799).

84940170681 is a wasteful number, since it uses less digits than its factorization.

84940170681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6517.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 84940170681 in words is "eighty-four billion, nine hundred forty million, one hundred seventy thousand, six hundred eighty-one".