1055651644566 has 32 divisors (see below), whose sum is σ = 2346010312800. Its totient is φ = 351866216160.

The previous prime is 1055651644543. The next prime is 1055651644643. The reversal of 1055651644566 is 6654461565501.

1055651644566 is a `hidden beast` number, since 1 + 0 + 5 + 5 + 65 + 16 + 4 + 4 + 566 = 666.

It is a super-2 number, since 2×1055651644566² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617880 + ... + 1578948.

It is an arithmetic number, because the mean of its divisors is an integer number (73312822275).

Almost surely, 2^{1055651644566} is an apocalyptic number.

1055651644566 is an abundant number, since it is smaller than the sum of its proper divisors (1290358668234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055651644566 is a wasteful number, since it uses less digits than its factorization.

1055651644566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981421 (or 981415 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 1055651644566 in words is "one trillion, fifty-five billion, six hundred fifty-one million, six hundred forty-four thousand, five hundred sixty-six".