7689643533 has 90 divisors (see below), whose sum is σ = 13357068270. Its totient is φ = 4237691040.

The previous prime is 7689643523. The next prime is 7689643537. The reversal of 7689643533 is 3353469867.

7689643533 is a `hidden beast` number, since 7 + 68 + 9 + 6 + 43 + 533 = 666.

7689643533 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5323599369 + 2366044164 = 72963^2 + 48642^2 .

It is not a de Polignac number, because 7689643533 - 2¹² = 7689639437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7689643533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7689643537) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 114770766 + ... + 114770832.

Almost surely, 2^7689643533 is an apocalyptic number.

It is an amenable number.

7689643533 is a deficient number, since it is larger than the sum of its proper divisors (5667424737).

7689643533 is an equidigital number, since it uses as much as digits as its factorization.

7689643533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 94 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The square root of 7689643533 is about 87690.6125705597. The cubic root of 7689643533 is about 1973.7951125874.

The spelling of 7689643533 in words is "seven billion, six hundred eighty-nine million, six hundred forty-three thousand, five hundred thirty-three".