55161562221601 has 16 divisors (see below), whose sum is σ = 60189748065216. Its totient is φ = 50135627520000.

The previous prime is 55161562221581. The next prime is 55161562221611. The reversal of 55161562221601 is 10612226516155.

It is not a de Polignac number, because 55161562221601 - 2⁷ = 55161562221473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55161562221611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096168521 + ... + 1096218841.

It is an arithmetic number, because the mean of its divisors is an integer number (3761859254076).

Almost surely, 2^{55161562221601} is an apocalyptic number.

It is an amenable number.

55161562221601 is a deficient number, since it is larger than the sum of its proper divisors (5028185843615).

55161562221601 is a wasteful number, since it uses less digits than its factorization.

55161562221601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70704.

The product of its (nonzero) digits is 216000, while the sum is 43.

Adding to 55161562221601 its reverse (10612226516155), we get a palindrome (65773788737756).

The spelling of 55161562221601 in words is "fifty-five trillion, one hundred sixty-one billion, five hundred sixty-two million, two hundred twenty-one thousand, six hundred one".