161556627234742 has 16 divisors (see below), whose sum is σ = 245034297766512. Its totient is φ = 79883404866720.

The previous prime is 161556627234733. The next prime is 161556627234817. The reversal of 161556627234742 is 247432726655161.

It is a super-3 number, since 3×161556627234742³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 1219155433 + ... + 1219287940.

It is an arithmetic number, because the mean of its divisors is an integer number (15314643610407).

Almost surely, 2^{161556627234742} is an apocalyptic number.

161556627234742 is a deficient number, since it is larger than the sum of its proper divisors (83477670531770).

161556627234742 is a wasteful number, since it uses less digits than its factorization.

161556627234742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438443743.

The product of its digits is 101606400, while the sum is 61.

The spelling of 161556627234742 in words is "one hundred sixty-one trillion, five hundred fifty-six billion, six hundred twenty-seven million, two hundred thirty-four thousand, seven hundred forty-two".