169449129738 has 32 divisors (see below), whose sum is σ = 430346997120. Its totient is φ = 48414036960.

The previous prime is 169449129737. The next prime is 169449129767. The reversal of 169449129738 is 837921944961.

169449129738 is a `hidden beast` number, since 1 + 6 + 94 + 491 + 29 + 7 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (169449129737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224138683 + ... + 224139438.

It is an arithmetic number, because the mean of its divisors is an integer number (13448343660).

Almost surely, 2^169449129738 is an apocalyptic number.

169449129738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

169449129738 is an abundant number, since it is smaller than the sum of its proper divisors (260897867382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169449129738 is a wasteful number, since it uses less digits than its factorization.

169449129738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448278139 (or 448278133 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 169449129738 in words is "one hundred sixty-nine billion, four hundred forty-nine million, one hundred twenty-nine thousand, seven hundred thirty-eight".