84655129978071 has 32 divisors (see below), whose sum is σ = 128234547678720. Its totient is φ = 55181980000512.

The previous prime is 84655129978049. The next prime is 84655129978093. The reversal of 84655129978071 is 17087992155648.

It is a happy number.

84655129978071 is a `hidden beast` number, since 8 + 46 + 551 + 29 + 9 + 7 + 8 + 0 + 7 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (84655129978049) and next prime (84655129978093).

It is not a de Polignac number, because 84655129978071 - 2⁶ = 84655129978007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84655129978571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194502235 + ... + 194936988.

It is an arithmetic number, because the mean of its divisors is an integer number (4007329614960).

Almost surely, 2^{84655129978071} is an apocalyptic number.

84655129978071 is a deficient number, since it is larger than the sum of its proper divisors (43579417700649).

84655129978071 is a wasteful number, since it uses less digits than its factorization.

84655129978071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389439412 (or 389439406 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 72.

The spelling of 84655129978071 in words is "eighty-four trillion, six hundred fifty-five billion, one hundred twenty-nine million, nine hundred seventy-eight thousand, seventy-one".