1055505556 has 48 divisors (see below), whose sum is σ = 2232885760. Its totient is φ = 426474720.

The previous prime is 1055505551. The next prime is 1055505559. The reversal of 1055505556 is 6555055501.

It is a super-2 number, since 2×1055505556² = 2228183957493738272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055505551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107551 + ... + 116953.

Almost surely, 2^1055505556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055505556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116442880).

1055505556 is an abundant number, since it is smaller than the sum of its proper divisors (1177380204).

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

1055505556 is a wasteful number, since it uses less digits than its factorization.

1055505556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644 (or 9642 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 37.

The square root of 1055505556 is about 32488.5449966600. The cubic root of 1055505556 is about 1018.1697139862.

The spelling of 1055505556 in words is "one billion, fifty-five million, five hundred five thousand, five hundred fifty-six".