169942669956 has 36 divisors (see below), whose sum is σ = 432060426252. Its totient is φ = 56320112064.

The previous prime is 169942669927. The next prime is 169942669973. The reversal of 169942669956 is 659966249961.

169942669956 is a `hidden beast` number, since 1 + 6 + 99 + 426 + 69 + 9 + 56 = 666.

169942669956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 110569550400 + 59373119556 = 332520^2 + 243666^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×169942669956² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13637211 + ... + 13649666.

It is an arithmetic number, because the mean of its divisors is an integer number (12001678507).

Almost surely, 2^169942669956 is an apocalyptic number.

It is an amenable number.

169942669956 is an abundant number, since it is smaller than the sum of its proper divisors (262117756296).

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

169942669956 is a wasteful number, since it uses less digits than its factorization.

169942669956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27287060 (or 27287055 counting only the distinct ones).

The product of its digits is 340122240, while the sum is 72.

The spelling of 169942669956 in words is "one hundred sixty-nine billion, nine hundred forty-two million, six hundred sixty-nine thousand, nine hundred fifty-six".