8253816639 has 16 divisors (see below), whose sum is σ = 11488038144. Its totient is φ = 5261256000.

The previous prime is 8253816583. The next prime is 8253816673. The reversal of 8253816639 is 9366183528.

It is a happy number.

It is not a de Polignac number, because 8253816639 - 2¹² = 8253812543 is a prime.

It is a super-2 number, since 2×8253816639² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8253816591 and 8253816600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8253816689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166539 + ... + 210339.

It is an arithmetic number, because the mean of its divisors is an integer number (718002384).

Almost surely, 2^8253816639 is an apocalyptic number.

8253816639 is a deficient number, since it is larger than the sum of its proper divisors (3234221505).

8253816639 is a wasteful number, since it uses less digits than its factorization.

8253816639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46558.

The product of its digits is 1866240, while the sum is 51.

The square root of 8253816639 is about 90850.5180997885. The cubic root of 8253816639 is about 2020.9315573089.

The spelling of 8253816639 in words is "eight billion, two hundred fifty-three million, eight hundred sixteen thousand, six hundred thirty-nine".