169978415009 has 8 divisors (see below), whose sum is σ = 183853041960. Its totient is φ = 156217982976.

The previous prime is 169978415003. The next prime is 169978415039. The reversal of 169978415009 is 900514879961.

It can be written as a sum of positive squares in 4 ways, for example, as 45157525009 + 124820890000 = 212503^2 + 353300^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169978415009 is a prime.

It is a super-3 number, since 3×169978415009³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169978415003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28545632 + ... + 28551585.

It is an arithmetic number, because the mean of its divisors is an integer number (22981630245).

Almost surely, 2^169978415009 is an apocalyptic number.

It is an amenable number.

169978415009 is a deficient number, since it is larger than the sum of its proper divisors (13874626951).

169978415009 is a wasteful number, since it uses less digits than its factorization.

169978415009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57097459.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 169978415009 in words is "one hundred sixty-nine billion, nine hundred seventy-eight million, four hundred fifteen thousand, nine".