55280277784166 has 64 divisors (see below), whose sum is σ = 88185251708928. Its totient is φ = 25934680351008.

The previous prime is 55280277784163. The next prime is 55280277784183. The reversal of 55280277784166 is 66148777208255.

It is a super-2 number, since 2×55280277784166² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55280277784096 and 55280277784105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55280277784163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2340092231 + ... + 2340115853.

It is an arithmetic number, because the mean of its divisors is an integer number (1377894557952).

Almost surely, 2^{55280277784166} is an apocalyptic number.

55280277784166 is a deficient number, since it is larger than the sum of its proper divisors (32904973924762).

55280277784166 is a wasteful number, since it uses less digits than its factorization.

55280277784166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26865.

The product of its (nonzero) digits is 316108800, while the sum is 68.

The spelling of 55280277784166 in words is "fifty-five trillion, two hundred eighty billion, two hundred seventy-seven million, seven hundred eighty-four thousand, one hundred sixty-six".