85553702173 has 2 divisors, whose sum is σ = 85553702174. Its totient is φ = 85553702172.

The previous prime is 85553702119. The next prime is 85553702197. The reversal of 85553702173 is 37120735558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57382765209 + 28170936964 = 239547^2 + 167842^2 .

It is a cyclic number.

It is not a de Polignac number, because 85553702173 - 2⁹ = 85553701661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85553772173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42776851086 + 42776851087.

It is an arithmetic number, because the mean of its divisors is an integer number (42776851087).

Almost surely, 2^85553702173 is an apocalyptic number.

It is an amenable number.

85553702173 is a deficient number, since it is larger than the sum of its proper divisors (1).

85553702173 is an equidigital number, since it uses as much as digits as its factorization.

85553702173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 85553702173 in words is "eighty-five billion, five hundred fifty-three million, seven hundred two thousand, one hundred seventy-three".