161210570721339 has 4 divisors (see below), whose sum is σ = 214947427628456. Its totient is φ = 107473713814224.

The previous prime is 161210570721289. The next prime is 161210570721353. The reversal of 161210570721339 is 933127075012161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 161210570721339 - 2¹² = 161210570717243 is a prime.

It is a super-2 number, since 2×161210570721339² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161210570721839) 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 3 ways as a sum of consecutive naturals, for example, 26868428453554 + ... + 26868428453559.

It is an arithmetic number, because the mean of its divisors is an integer number (53736856907114).

Almost surely, 2^{161210570721339} is an apocalyptic number.

161210570721339 is a deficient number, since it is larger than the sum of its proper divisors (53736856907117).

161210570721339 is an equidigital number, since it uses as much as digits as its factorization.

161210570721339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53736856907116.

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 161210570721339 in words is "one hundred sixty-one trillion, two hundred ten billion, five hundred seventy million, seven hundred twenty-one thousand, three hundred thirty-nine".