7686000638 has 4 divisors (see below), whose sum is σ = 11529000960. Its totient is φ = 3843000318.

The previous prime is 7686000583. The next prime is 7686000649. The reversal of 7686000638 is 8360006867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8360006867 = 353 ⋅23682739.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1921500158 + ... + 1921500161.

It is an arithmetic number, because the mean of its divisors is an integer number (2882250240).

Almost surely, 2^7686000638 is an apocalyptic number.

7686000638 is the 46862-nd centered heptagonal number.

7686000638 is a deficient number, since it is larger than the sum of its proper divisors (3843000322).

7686000638 is a wasteful number, since it uses less digits than its factorization.

7686000638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843000321.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 7686000638 is about 87669.8388158664. The cubic root of 7686000638 is about 1973.4833745090.

The spelling of 7686000638 in words is "seven billion, six hundred eighty-six million, six hundred thirty-eight", and thus it is an aban number.