1055785644 has 24 divisors (see below), whose sum is σ = 2737222320. Its totient is φ = 351928512.

The previous prime is 1055785637. The next prime is 1055785649. The reversal of 1055785644 is 4465875501.

1055785644 is a `hidden beast` number, since 1 + 0 + 557 + 8 + 56 + 44 = 666.

It is a super-2 number, since 2×1055785644² = 2229366652152989472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1055785644.

It is not an unprimeable number, because it can be changed into a prime (1055785649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4887789 + ... + 4888004.

It is an arithmetic number, because the mean of its divisors is an integer number (114050930).

Almost surely, 2^1055785644 is an apocalyptic number.

It is an amenable number.

1055785644 is an abundant number, since it is smaller than the sum of its proper divisors (1681436676).

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

1055785644 is a wasteful number, since it uses less digits than its factorization.

1055785644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9775806 (or 9775798 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The square root of 1055785644 is about 32492.8552761988. The cubic root of 1055785644 is about 1018.2597662196.

The spelling of 1055785644 in words is "one billion, fifty-five million, seven hundred eighty-five thousand, six hundred forty-four".