5263645990 has 8 divisors (see below), whose sum is σ = 9474562800. Its totient is φ = 2105458392.

The previous prime is 5263645987. The next prime is 5263645991. The reversal of 5263645990 is 995463625.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5263645991) by changing a digit.

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, 263182290 + ... + 263182309.

It is an arithmetic number, because the mean of its divisors is an integer number (1184320350).

Almost surely, 2^5263645990 is an apocalyptic number.

5263645990 is a deficient number, since it is larger than the sum of its proper divisors (4210916810).

5263645990 is a wasteful number, since it uses less digits than its factorization.

5263645990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526364606.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The square root of 5263645990 is about 72550.9888974644. The cubic root of 5263645990 is about 1739.5178553588.

The spelling of 5263645990 in words is "five billion, two hundred sixty-three million, six hundred forty-five thousand, nine hundred ninety".