2042555645 has 8 divisors (see below), whose sum is σ = 2639610456. Its totient is φ = 1508348736.

The previous prime is 2042555617. The next prime is 2042555663. The reversal of 2042555645 is 5465552402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101888836 + 1940666809 = 10094^2 + 44053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2042555645 - 2¹² = 2042551549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042555599 and 2042555608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15711902 + ... + 15712031.

It is an arithmetic number, because the mean of its divisors is an integer number (329951307).

Almost surely, 2^2042555645 is an apocalyptic number.

It is an amenable number.

2042555645 is a deficient number, since it is larger than the sum of its proper divisors (597054811).

2042555645 is a wasteful number, since it uses less digits than its factorization.

2042555645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31423951.

The product of its (nonzero) digits is 240000, while the sum is 38.

The square root of 2042555645 is about 45194.6417731129. The cubic root of 2042555645 is about 1268.7945337082.

The spelling of 2042555645 in words is "two billion, forty-two million, five hundred fifty-five thousand, six hundred forty-five".