1085664554 has 16 divisors (see below), whose sum is σ = 1771134120. Its totient is φ = 496113600.

The previous prime is 1085664539. The next prime is 1085664581. The reversal of 1085664554 is 4554665801.

It can be written as a sum of positive squares in 4 ways, for example, as 769785025 + 315879529 = 27745^2 + 17773^2 .

It is a super-4 number, since 4×1085664554⁴ (a number of 37 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204089 + ... + 209340.

Almost surely, 2^1085664554 is an apocalyptic number.

1085664554 is a deficient number, since it is larger than the sum of its proper divisors (685469566).

1085664554 is a wasteful number, since it uses less digits than its factorization.

1085664554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413545.

The product of its (nonzero) digits is 576000, while the sum is 44.

The square root of 1085664554 is about 32949.4241831325. The cubic root of 1085664554 is about 1027.7761912660.

The spelling of 1085664554 in words is "one billion, eighty-five million, six hundred sixty-four thousand, five hundred fifty-four".