169434520623 has 12 divisors (see below), whose sum is σ = 245669321040. Its totient is φ = 112526853696.

The previous prime is 169434520561. The next prime is 169434520643. The reversal of 169434520623 is 326025434961.

169434520623 is a `hidden beast` number, since 1 + 6 + 9 + 434 + 5 + 206 + 2 + 3 = 666.

It is not a de Polignac number, because 169434520623 - 2⁶ = 169434520559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169434520643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35788618 + ... + 35793351.

It is an arithmetic number, because the mean of its divisors is an integer number (20472443420).

Almost surely, 2^169434520623 is an apocalyptic number.

169434520623 is a deficient number, since it is larger than the sum of its proper divisors (76234800417).

169434520623 is a wasteful number, since it uses less digits than its factorization.

169434520623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71582238 (or 71582235 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 169434520623 in words is "one hundred sixty-nine billion, four hundred thirty-four million, five hundred twenty thousand, six hundred twenty-three".