161405467208285 has 8 divisors (see below), whose sum is σ = 195400601010360. Its totient is φ = 127981680193024.

The previous prime is 161405467208261. The next prime is 161405467208329. The reversal of 161405467208285 is 582802764504161.

It can be written as a sum of positive squares in 4 ways, for example, as 3584588676601 + 157820878531684 = 1893301^2 + 12562678^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161405467208285 - 2⁶ = 161405467208221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142836696080 + ... + 142836697209.

It is an arithmetic number, because the mean of its divisors is an integer number (24425075126295).

Almost surely, 2^{161405467208285} is an apocalyptic number.

It is an amenable number.

161405467208285 is a deficient number, since it is larger than the sum of its proper divisors (33995133802075).

161405467208285 is a wasteful number, since it uses less digits than its factorization.

161405467208285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285673393407.

The product of its (nonzero) digits is 25804800, while the sum is 59.

The spelling of 161405467208285 in words is "one hundred sixty-one trillion, four hundred five billion, four hundred sixty-seven million, two hundred eight thousand, two hundred eighty-five".