105554161881 has 99 divisors (see below), whose sum is σ = 185149544853. Its totient is φ = 60000869880.

The previous prime is 105554161847. The next prime is 105554161931. The reversal of 105554161881 is 188161455501.

The square root of 105554161881 is 324891.

It is a perfect power (a square), and thus also a powerful number.

105554161881 is a `hidden beast` number, since 1 + 0 + 5 + 55 + 416 + 188 + 1 = 666.

It is not a de Polignac number, because 105554161881 - 2⁹ = 105554161369 is a prime.

It is a super-2 number, since 2×105554161881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105554161841) by changing a digit.

It is a polite number, since it can be written in 98 ways as a sum of consecutive naturals, for example, 552639496 + ... + 552639686.

Almost surely, 2^105554161881 is an apocalyptic number.

105554161881 is the 324891-st square number.

105554161881 is the 162446-th centered octagonal number.

It is an amenable number.

105554161881 is a deficient number, since it is larger than the sum of its proper divisors (79595382972).

105554161881 is an frugal number, since it uses more digits than its factorization.

105554161881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 45.

It can be divided in two parts, 105 and 554161881, that added together give a triangular number (554161986 = T₃₃₂₉₁).

The spelling of 105554161881 in words is "one hundred five billion, five hundred fifty-four million, one hundred sixty-one thousand, eight hundred eighty-one".