1361053566 has 48 divisors (see below), whose sum is σ = 3081869856. Its totient is φ = 433295808.

The previous prime is 1361053559. The next prime is 1361053571. The reversal of 1361053566 is 6653501631.

1361053566 is a `hidden beast` number, since 1 + 3 + 61 + 0 + 535 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1361053566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317896 + ... + 322148.

It is an arithmetic number, because the mean of its divisors is an integer number (64205622).

Almost surely, 2^1361053566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1361053566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540934928).

1361053566 is an abundant number, since it is smaller than the sum of its proper divisors (1720816290).

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

1361053566 is a wasteful number, since it uses less digits than its factorization.

1361053566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 1361053566 is about 36892.4594734480. The cubic root of 1361053566 is about 1108.2176753276.

It can be divided in two parts, 13610 and 53566, that added together give a palindrome (67176).

The spelling of 1361053566 in words is "one billion, three hundred sixty-one million, fifty-three thousand, five hundred sixty-six".