161552065642 has 16 divisors (see below), whose sum is σ = 275851749312. Its totient is φ = 70240028320.

The previous prime is 161552065639. The next prime is 161552065691. The reversal of 161552065642 is 246560255161.

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, 159635923 + ... + 159636934.

It is an arithmetic number, because the mean of its divisors is an integer number (17240734332).

Almost surely, 2^161552065642 is an apocalyptic number.

161552065642 is a deficient number, since it is larger than the sum of its proper divisors (114299683670).

161552065642 is a wasteful number, since it uses less digits than its factorization.

161552065642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319272893.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 161552065642 in words is "one hundred sixty-one billion, five hundred fifty-two million, sixty-five thousand, six hundred forty-two".