85238004161 has 2 divisors, whose sum is σ = 85238004162. Its totient is φ = 85238004160.

The previous prime is 85238004157. The next prime is 85238004239. The reversal of 85238004161 is 16140083258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54309505936 + 30928498225 = 233044^2 + 175865^2 .

It is a cyclic number.

It is not a de Polignac number, because 85238004161 - 2² = 85238004157 is a prime.

It is not a weakly prime, because it can be changed into another prime (85238004101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42619002080 + 42619002081.

It is an arithmetic number, because the mean of its divisors is an integer number (42619002081).

Almost surely, 2^85238004161 is an apocalyptic number.

It is an amenable number.

85238004161 is a deficient number, since it is larger than the sum of its proper divisors (1).

85238004161 is an equidigital number, since it uses as much as digits as its factorization.

85238004161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 85238004161 in words is "eighty-five billion, two hundred thirty-eight million, four thousand, one hundred sixty-one".