156229916905 has 4 divisors (see below), whose sum is σ = 187475900292. Its totient is φ = 124983933520.

The previous prime is 156229916891. The next prime is 156229916911. The reversal of 156229916905 is 509619922651.

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 37764537561 + 118465379344 = 194331^2 + 344188^2 .

It is not a de Polignac number, because 156229916905 - 2³¹ = 154082433257 is a prime.

It is a super-2 number, since 2×156229916905² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15622991686 + ... + 15622991695.

It is an arithmetic number, because the mean of its divisors is an integer number (46868975073).

Almost surely, 2^156229916905 is an apocalyptic number.

It is an amenable number.

156229916905 is a deficient number, since it is larger than the sum of its proper divisors (31245983387).

156229916905 is an equidigital number, since it uses as much as digits as its factorization.

156229916905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31245983386.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 156229916905 in words is "one hundred fifty-six billion, two hundred twenty-nine million, nine hundred sixteen thousand, nine hundred five".