1055555556 has 48 divisors (see below), whose sum is σ = 2707423488. Its totient is φ = 317418400.

The previous prime is 1055555519. The next prime is 1055555561. The reversal of 1055555556 is 6555555501.

It is a super-2 number, since 2×1055555556² = 2228395063604938272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13230 + ... + 47813.

It is an arithmetic number, because the mean of its divisors is an integer number (56404656).

Almost surely, 2^1055555556 is an apocalyptic number.

It is an amenable number.

1055555556 is an abundant number, since it is smaller than the sum of its proper divisors (1651867932).

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

1055555556 is a wasteful number, since it uses less digits than its factorization.

1055555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61192 (or 61190 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 42.

The square root of 1055555556 is about 32489.3144895364. The cubic root of 1055555556 is about 1018.1857908578.

Subtracting 1055555556 from its reverse (6555555501), we obtain a palindrome (5499999945).

It can be divided in two parts, 105555 and 5556, that added together give a palindrome (111111).

The spelling of 1055555556 in words is "one billion, fifty-five million, five hundred fifty-five thousand, five hundred fifty-six".