84075076521 has 16 divisors (see below), whose sum is σ = 126261913920. Its totient is φ = 55282240800.

The previous prime is 84075076499. The next prime is 84075076549. The reversal of 84075076521 is 12567057048.

84075076521 is a `hidden beast` number, since 8 + 4 + 0 + 7 + 50 + 76 + 521 = 666.

It is not a de Polignac number, because 84075076521 - 2⁵ = 84075076489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84075076571) 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, 21326055 + ... + 21329996.

It is an arithmetic number, because the mean of its divisors is an integer number (7891369620).

Almost surely, 2^84075076521 is an apocalyptic number.

It is an amenable number.

84075076521 is a deficient number, since it is larger than the sum of its proper divisors (42186837399).

84075076521 is a wasteful number, since it uses less digits than its factorization.

84075076521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42656133 (or 42656127 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 84075076521 in words is "eighty-four billion, seventy-five million, seventy-six thousand, five hundred twenty-one".