161969359747104 has 216 divisors, whose sum is σ = 577015844752620. Its totient is φ = 42717193731072.

The previous prime is 161969359747007. The next prime is 161969359747109. The reversal of 161969359747104 is 401747953969161.

161969359747104 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 69 + 3 + 5 + 97 + 471 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 158660525986704 + 3308833760400 = 12596052^2 + 1819020^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (161969359747109) 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 35 ways as a sum of consecutive naturals, for example, 441255799 + ... + 441622710.

Almost surely, 2^{161969359747104} is an apocalyptic number.

161969359747104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161969359747104 is an abundant number, since it is smaller than the sum of its proper divisors (415046485005516).

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

161969359747104 is a wasteful number, since it uses less digits than its factorization.

161969359747104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882878552 (or 882878534 counting only the distinct ones).

The product of its (nonzero) digits is 308629440, while the sum is 72.

The spelling of 161969359747104 in words is "one hundred sixty-one trillion, nine hundred sixty-nine billion, three hundred fifty-nine million, seven hundred forty-seven thousand, one hundred four".