1085553664 has 44 divisors (see below), whose sum is σ = 2337002584. Its totient is φ = 501018624.

The previous prime is 1085553653. The next prime is 1085553673. The reversal of 1085553664 is 4663555801.

It is a self number, because there is not a number n which added to its sum of digits gives 1085553664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27462 + ... + 54085.

Almost surely, 2^1085553664 is an apocalyptic number.

It is an amenable number.

1085553664 is an abundant number, since it is smaller than the sum of its proper divisors (1251448920).

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

1085553664 is an equidigital number, since it uses as much as digits as its factorization.

1085553664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81580 (or 81562 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The square root of 1085553664 is about 32947.7414096930. The cubic root of 1085553664 is about 1027.7411976510.

The spelling of 1085553664 in words is "one billion, eighty-five million, five hundred fifty-three thousand, six hundred sixty-four".