161368528769 has 32 divisors (see below), whose sum is σ = 193391827200. Its totient is φ = 134516543616.

The previous prime is 161368528757. The next prime is 161368528777. The reversal of 161368528769 is 967825863161.

It is not a de Polignac number, because 161368528769 - 2⁴ = 161368528753 is a prime.

It is a super-2 number, since 2×161368528769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161368528169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3413039 + ... + 3459995.

It is an arithmetic number, because the mean of its divisors is an integer number (6043494600).

Almost surely, 2^161368528769 is an apocalyptic number.

It is an amenable number.

161368528769 is a deficient number, since it is larger than the sum of its proper divisors (32023298431).

161368528769 is an equidigital number, since it uses as much as digits as its factorization.

161368528769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47254 (or 47240 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 62.

The spelling of 161368528769 in words is "one hundred sixty-one billion, three hundred sixty-eight million, five hundred twenty-eight thousand, seven hundred sixty-nine".