1085561647 has 4 divisors (see below), whose sum is σ = 1085713216. Its totient is φ = 1085410080.

The previous prime is 1085561641. The next prime is 1085561651. The reversal of 1085561647 is 7461655801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1085561647 - 2²³ = 1077173039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085561641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64479 + ... + 79552.

It is an arithmetic number, because the mean of its divisors is an integer number (271428304).

Almost surely, 2^1085561647 is an apocalyptic number.

1085561647 is a deficient number, since it is larger than the sum of its proper divisors (151569).

1085561647 is an equidigital number, since it uses as much as digits as its factorization.

1085561647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151568.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1085561647 is about 32947.8625558624. The cubic root of 1085561647 is about 1027.7437169300.

The spelling of 1085561647 in words is "one billion, eighty-five million, five hundred sixty-one thousand, six hundred forty-seven".