1055980645 has 4 divisors (see below), whose sum is σ = 1267176780. Its totient is φ = 844784512.

The previous prime is 1055980633. The next prime is 1055980661. The reversal of 1055980645 is 5460895501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196728676 + 859251969 = 14026^2 + 29313^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055980645 - 2¹¹ = 1055978597 is a prime.

It is a super-2 number, since 2×1055980645² = 2230190245229232050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105598060 + ... + 105598069.

It is an arithmetic number, because the mean of its divisors is an integer number (316794195).

Almost surely, 2^1055980645 is an apocalyptic number.

It is an amenable number.

1055980645 is a deficient number, since it is larger than the sum of its proper divisors (211196135).

1055980645 is an equidigital number, since it uses as much as digits as its factorization.

1055980645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211196134.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 1055980645 is about 32495.8558127033. The cubic root of 1055980645 is about 1018.3224523814.

It can be divided in two parts, 10559 and 80645, that added together give a square (91204 = 302²).

The spelling of 1055980645 in words is "one billion, fifty-five million, nine hundred eighty thousand, six hundred forty-five".