161256612235 has 8 divisors (see below), whose sum is σ = 193576256640. Its totient is φ = 128959741824.

The previous prime is 161256612227. The next prime is 161256612269. The reversal of 161256612235 is 532216652161.

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 161256612235 - 2³ = 161256612227 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 5677915 + ... + 5706244.

It is an arithmetic number, because the mean of its divisors is an integer number (24197032080).

Almost surely, 2^161256612235 is an apocalyptic number.

161256612235 is a deficient number, since it is larger than the sum of its proper divisors (32319644405).

161256612235 is a wasteful number, since it uses less digits than its factorization.

161256612235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11386997.

The product of its digits is 129600, while the sum is 40.

The spelling of 161256612235 in words is "one hundred sixty-one billion, two hundred fifty-six million, six hundred twelve thousand, two hundred thirty-five".