1055644642 has 12 divisors (see below), whose sum is σ = 1714642290. Its totient is φ = 487220448.

The previous prime is 1055644621. The next prime is 1055644649. The reversal of 1055644642 is 2464465501.

It can be written as a sum of positive squares in 3 ways, for example, as 268337161 + 787307481 = 16381^2 + 28059^2 .

It is a super-2 number, since 2×1055644642² = 2228771220366616328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055644649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1561267 + ... + 1561942.

Almost surely, 2^1055644642 is an apocalyptic number.

1055644642 is a deficient number, since it is larger than the sum of its proper divisors (658997648).

1055644642 is a wasteful number, since it uses less digits than its factorization.

1055644642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123237 (or 3123224 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 1055644642 is about 32490.6854652222. The cubic root of 1055644642 is about 1018.2144340834.

The spelling of 1055644642 in words is "one billion, fifty-five million, six hundred forty-four thousand, six hundred forty-two".