156481444165 has 4 divisors (see below), whose sum is σ = 187777733004. Its totient is φ = 125185155328.

The previous prime is 156481444117. The next prime is 156481444211. The reversal of 156481444165 is 561444184651.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26176327681 + 130305116484 = 161791^2 + 360978^2 .

It is a cyclic number.

It is not a de Polignac number, because 156481444165 - 2¹⁹ = 156480919877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15648144412 + ... + 15648144421.

It is an arithmetic number, because the mean of its divisors is an integer number (46944433251).

Almost surely, 2^156481444165 is an apocalyptic number.

It is an amenable number.

156481444165 is a deficient number, since it is larger than the sum of its proper divisors (31296288839).

156481444165 is an equidigital number, since it uses as much as digits as its factorization.

156481444165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31296288838.

The product of its digits is 1843200, while the sum is 49.

The spelling of 156481444165 in words is "one hundred fifty-six billion, four hundred eighty-one million, four hundred forty-four thousand, one hundred sixty-five".