169090861535988 has 96 divisors (see below), whose sum is σ = 461456187945984. Its totient is φ = 47181911954688.

The previous prime is 169090861535977. The next prime is 169090861535989. The reversal of 169090861535988 is 889535168090961.

It is a super-2 number, since 2×169090861535988² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169090861535989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24278931 + ... + 30457317.

It is an arithmetic number, because the mean of its divisors is an integer number (4806835291104).

Almost surely, 2^{169090861535988} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169090861535988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230728093972992).

169090861535988 is an abundant number, since it is smaller than the sum of its proper divisors (292365326409996).

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

169090861535988 is a wasteful number, since it uses less digits than its factorization.

169090861535988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186021 (or 6186019 counting only the distinct ones).

The product of its (nonzero) digits is 1007769600, while the sum is 78.

The spelling of 169090861535988 in words is "one hundred sixty-nine trillion, ninety billion, eight hundred sixty-one million, five hundred thirty-five thousand, nine hundred eighty-eight".