6390244045 has 4 divisors (see below), whose sum is σ = 7668292860. Its totient is φ = 5112195232.

The previous prime is 6390244009. The next prime is 6390244057. The reversal of 6390244045 is 5404420936.

It is a happy number.

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 2299106601 + 4091137444 = 47949^2 + 63962^2 .

It is a cyclic number.

It is not a de Polignac number, because 6390244045 - 2¹⁷ = 6390112973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6390243995 and 6390244013.

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, 639024400 + ... + 639024409.

It is an arithmetic number, because the mean of its divisors is an integer number (1917073215).

Almost surely, 2^6390244045 is an apocalyptic number.

It is an amenable number.

6390244045 is a deficient number, since it is larger than the sum of its proper divisors (1278048815).

6390244045 is a wasteful number, since it uses less digits than its factorization.

6390244045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278048814.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6390244045 is about 79939.0020265452. The cubic root of 6390244045 is about 1855.6916550976.

The spelling of 6390244045 in words is "six billion, three hundred ninety million, two hundred forty-four thousand, forty-five".