16523013173 has 2 divisors, whose sum is σ = 16523013174. Its totient is φ = 16523013172.

The previous prime is 16523013121. The next prime is 16523013197. The reversal of 16523013173 is 37131032561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13239493969 + 3283519204 = 115063^2 + 57302^2 .

It is a cyclic number.

It is not a de Polignac number, because 16523013173 - 2⁸ = 16523012917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16523013103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8261506586 + 8261506587.

It is an arithmetic number, because the mean of its divisors is an integer number (8261506587).

Almost surely, 2^16523013173 is an apocalyptic number.

It is an amenable number.

16523013173 is a deficient number, since it is larger than the sum of its proper divisors (1).

16523013173 is an equidigital number, since it uses as much as digits as its factorization.

16523013173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 16523013173 in words is "sixteen billion, five hundred twenty-three million, thirteen thousand, one hundred seventy-three".