84242723651 has 2 divisors, whose sum is σ = 84242723652. Its totient is φ = 84242723650.

The previous prime is 84242723647. The next prime is 84242723681. The reversal of 84242723651 is 15632724248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84242723651 - 2² = 84242723647 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84242723611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42121361825 + 42121361826.

It is an arithmetic number, because the mean of its divisors is an integer number (42121361826).

Almost surely, 2^84242723651 is an apocalyptic number.

84242723651 is a deficient number, since it is larger than the sum of its proper divisors (1).

84242723651 is an equidigital number, since it uses as much as digits as its factorization.

84242723651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 44.

The spelling of 84242723651 in words is "eighty-four billion, two hundred forty-two million, seven hundred twenty-three thousand, six hundred fifty-one".