1005605556 has 36 divisors (see below), whose sum is σ = 2492564928. Its totient is φ = 315483008.

The previous prime is 1005605521. The next prime is 1005605569. The reversal of 1005605556 is 6555065001.

It is a super-3 number, since 3×1005605556³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141516 + ... + 148451.

Almost surely, 2^1005605556 is an apocalyptic number.

It is an amenable number.

1005605556 is an abundant number, since it is smaller than the sum of its proper divisors (1486959372).

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

1005605556 is a wasteful number, since it uses less digits than its factorization.

1005605556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290008 (or 289989 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 1005605556 is about 31711.2843637718. The cubic root of 1005605556 is about 1001.8650381370.

The spelling of 1005605556 in words is "one billion, five million, six hundred five thousand, five hundred fifty-six".