169489984961 has 4 divisors (see below), whose sum is σ = 184898165424. Its totient is φ = 154081804500.

The previous prime is 169489984927. The next prime is 169489984969.

169489984961 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 169489984961 - 2²² = 169485790657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169489984969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7704090215 + ... + 7704090236.

It is an arithmetic number, because the mean of its divisors is an integer number (46224541356).

Almost surely, 2^169489984961 is an apocalyptic number.

169489984961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

169489984961 is a deficient number, since it is larger than the sum of its proper divisors (15408180463).

169489984961 is a wasteful number, since it uses less digits than its factorization.

169489984961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15408180462.

The product of its digits is 241864704, while the sum is 74.

The spelling of 169489984961 in words is "one hundred sixty-nine billion, four hundred eighty-nine million, nine hundred eighty-four thousand, nine hundred sixty-one".