84756020057 has 4 divisors (see below), whose sum is σ = 84759041280. Its totient is φ = 84752998836.

The previous prime is 84756020051. The next prime is 84756020081. The reversal of 84756020057 is 75002065748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84756020057 - 2⁶ = 84756019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84756020051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468133 + ... + 1524770.

It is an arithmetic number, because the mean of its divisors is an integer number (21189760320).

Almost surely, 2^84756020057 is an apocalyptic number.

It is an amenable number.

84756020057 is a deficient number, since it is larger than the sum of its proper divisors (3021223).

84756020057 is a wasteful number, since it uses less digits than its factorization.

84756020057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021222.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 84756020057 in words is "eighty-four billion, seven hundred fifty-six million, twenty thousand, fifty-seven".