84756020051 has 2 divisors, whose sum is σ = 84756020052. Its totient is φ = 84756020050.

The previous prime is 84756020047. The next prime is 84756020081. The reversal of 84756020051 is 15002065748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84756020051 - 2² = 84756020047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84756019987 and 84756020014.

It is not a weakly prime, because it can be changed into another prime (84756020081) 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 as a sum of consecutive naturals, namely, 42378010025 + 42378010026.

It is an arithmetic number, because the mean of its divisors is an integer number (42378010026).

Almost surely, 2^84756020051 is an apocalyptic number.

84756020051 is a deficient number, since it is larger than the sum of its proper divisors (1).

84756020051 is an equidigital number, since it uses as much as digits as its factorization.

84756020051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 38.

Adding to 84756020051 its reverse (15002065748), we get a palindrome (99758085799).

The spelling of 84756020051 in words is "eighty-four billion, seven hundred fifty-six million, twenty thousand, fifty-one".