1085556608749 has 4 divisors (see below), whose sum is σ = 1085867570880. Its totient is φ = 1085245646620.

The previous prime is 1085556608743. The next prime is 1085556608767. The reversal of 1085556608749 is 9478066555801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085556608749 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 (1085556608743) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 155475829 + ... + 155482810.

It is an arithmetic number, because the mean of its divisors is an integer number (271466892720).

Almost surely, 2^{1085556608749} is an apocalyptic number.

It is an amenable number.

1085556608749 is a deficient number, since it is larger than the sum of its proper divisors (310962131).

1085556608749 is an equidigital number, since it uses as much as digits as its factorization.

1085556608749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310962130.

The product of its (nonzero) digits is 72576000, while the sum is 64.

The spelling of 1085556608749 in words is "one trillion, eighty-five billion, five hundred fifty-six million, six hundred eight thousand, seven hundred forty-nine".