84670981769871 has 112 divisors (see below), whose sum is σ = 153721634299200. Its totient is φ = 45506682814464.

The previous prime is 84670981769867. The next prime is 84670981769893. The reversal of 84670981769871 is 17896718907648.

84670981769871 is a `hidden beast` number, since 8 + 467 + 0 + 9 + 8 + 1 + 76 + 9 + 87 + 1 = 666.

It is not a de Polignac number, because 84670981769871 - 2² = 84670981769867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84670981769821) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 128844495 + ... + 129499983.

Almost surely, 2^{84670981769871} is an apocalyptic number.

84670981769871 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

84670981769871 is a deficient number, since it is larger than the sum of its proper divisors (69050652529329).

84670981769871 is a wasteful number, since it uses less digits than its factorization.

84670981769871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657020 (or 657005 counting only the distinct ones).

The product of its (nonzero) digits is 2048385024, while the sum is 81.

The spelling of 84670981769871 in words is "eighty-four trillion, six hundred seventy billion, nine hundred eighty-one million, seven hundred sixty-nine thousand, eight hundred seventy-one".