1055644650 has 120 divisors (see below), whose sum is σ = 2981909964. Its totient is φ = 276825600.

The previous prime is 1055644649. The next prime is 1055644661. The reversal of 1055644650 is 564465501.

1055644650 is a `hidden beast` number, since 1 + 0 + 5 + 5 + 644 + 6 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 51451929 + 1004192721 = 7173^2 + 31689^2 .

It is a super-2 number, since 2×1055644650² = 2228771254147245000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 244914 + ... + 249186.

Almost surely, 2^1055644650 is an apocalyptic number.

1055644650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055644650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490954982).

1055644650 is an abundant number, since it is smaller than the sum of its proper divisors (1926265314).

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

1055644650 is a wasteful number, since it uses less digits than its factorization.

1055644650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358 (or 4344 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1055644650 is about 32490.6855883344. The cubic root of 1055644650 is about 1018.2144366555.

The spelling of 1055644650 in words is "one billion, fifty-five million, six hundred forty-four thousand, six hundred fifty".