86947734721 has 16 divisors (see below), whose sum is σ = 91546963200. Its totient is φ = 82457625600.

The previous prime is 86947734719. The next prime is 86947734743. The reversal of 86947734721 is 12743774968.

It is not a de Polignac number, because 86947734721 - 2¹ = 86947734719 is a prime.

It is a super-2 number, since 2×86947734721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86947734701) 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, 2085601 + ... + 2126881.

It is an arithmetic number, because the mean of its divisors is an integer number (5721685200).

Almost surely, 2^86947734721 is an apocalyptic number.

It is an amenable number.

86947734721 is a deficient number, since it is larger than the sum of its proper divisors (4599228479).

86947734721 is a wasteful number, since it uses less digits than its factorization.

86947734721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42600.

The product of its digits is 14224896, while the sum is 58.

The spelling of 86947734721 in words is "eighty-six billion, nine hundred forty-seven million, seven hundred thirty-four thousand, seven hundred twenty-one".