84388953617 has 2 divisors, whose sum is σ = 84388953618. Its totient is φ = 84388953616.

The previous prime is 84388953613. The next prime is 84388953667. The reversal of 84388953617 is 71635988348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76995705361 + 7393248256 = 277481^2 + 85984^2 .

It is a cyclic number.

It is not a de Polignac number, because 84388953617 - 2² = 84388953613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84388953617.

It is not a weakly prime, because it can be changed into another prime (84388953613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42194476808 + 42194476809.

It is an arithmetic number, because the mean of its divisors is an integer number (42194476809).

Almost surely, 2^84388953617 is an apocalyptic number.

It is an amenable number.

84388953617 is a deficient number, since it is larger than the sum of its proper divisors (1).

84388953617 is an equidigital number, since it uses as much as digits as its factorization.

84388953617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 62.

The spelling of 84388953617 in words is "eighty-four billion, three hundred eighty-eight million, nine hundred fifty-three thousand, six hundred seventeen".