84087638271 has 160 divisors (see below), whose sum is σ = 164244060288. Its totient is φ = 41604710400.

The previous prime is 84087638269. The next prime is 84087638281. The reversal of 84087638271 is 17283678048.

It is a happy number.

It is not a de Polignac number, because 84087638271 - 2¹ = 84087638269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84087638231) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 44232421 + ... + 44234321.

Almost surely, 2^84087638271 is an apocalyptic number.

84087638271 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

84087638271 is a deficient number, since it is larger than the sum of its proper divisors (80156422017).

84087638271 is a wasteful number, since it uses less digits than its factorization.

84087638271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 84087638271 in words is "eighty-four billion, eighty-seven million, six hundred thirty-eight thousand, two hundred seventy-one".