88685656909 has 2 divisors, whose sum is σ = 88685656910. Its totient is φ = 88685656908.

The previous prime is 88685656897. The next prime is 88685656957. The reversal of 88685656909 is 90965658688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64092517225 + 24593139684 = 253165^2 + 156822^2 .

It is a cyclic number.

It is not a de Polignac number, because 88685656909 - 2⁵ = 88685656877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88685654909) 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, 44342828454 + 44342828455.

It is an arithmetic number, because the mean of its divisors is an integer number (44342828455).

Almost surely, 2^88685656909 is an apocalyptic number.

It is an amenable number.

88685656909 is a deficient number, since it is larger than the sum of its proper divisors (1).

88685656909 is an equidigital number, since it uses as much as digits as its factorization.

88685656909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 223948800, while the sum is 70.

The spelling of 88685656909 in words is "eighty-eight billion, six hundred eighty-five million, six hundred fifty-six thousand, nine hundred nine".