84521591075 has 12 divisors (see below), whose sum is σ = 107036705760. Its totient is φ = 66178606560.

The previous prime is 84521591059. The next prime is 84521591081. The reversal of 84521591075 is 57019512548.

It is a happy number.

It is not a de Polignac number, because 84521591075 - 2⁴ = 84521591059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35965460 + ... + 35967809.

It is an arithmetic number, because the mean of its divisors is an integer number (8919725480).

Almost surely, 2^84521591075 is an apocalyptic number.

84521591075 is a deficient number, since it is larger than the sum of its proper divisors (22515114685).

84521591075 is a wasteful number, since it uses less digits than its factorization.

84521591075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71933326 (or 71933321 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 47.

The spelling of 84521591075 in words is "eighty-four billion, five hundred twenty-one million, five hundred ninety-one thousand, seventy-five".