161669144328280 has 32 divisors (see below), whose sum is σ = 363764078148240. Its totient is φ = 64666146014080.

The previous prime is 161669144328277. The next prime is 161669144328283. The reversal of 161669144328280 is 82823441966161.

161669144328280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161669144328277) and next prime (161669144328283).

It is a super-2 number, since 2×161669144328280² (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 (161669144328283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45507886 + ... + 48931645.

Almost surely, 2^{161669144328280} is an apocalyptic number.

161669144328280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161669144328280 is an abundant number, since it is smaller than the sum of its proper divisors (202094933819960).

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

161669144328280 is a wasteful number, since it uses less digits than its factorization.

161669144328280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94482339 (or 94482335 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 61.

The spelling of 161669144328280 in words is "one hundred sixty-one trillion, six hundred sixty-nine billion, one hundred forty-four million, three hundred twenty-eight thousand, two hundred eighty".