7638523690865 has 8 divisors (see below), whose sum is σ = 9321588233280. Its totient is φ = 6007245749872.

The previous prime is 7638523690859. The next prime is 7638523690933. The reversal of 7638523690865 is 5680963258367.

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

It is a cyclic number.

It is not a de Polignac number, because 7638523690865 - 2⁴² = 3240477179761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7638523690795 and 7638523690804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12946650029 + ... + 12946650618.

It is an arithmetic number, because the mean of its divisors is an integer number (1165198529160).

Almost surely, 2^{7638523690865} is an apocalyptic number.

It is an amenable number.

7638523690865 is a deficient number, since it is larger than the sum of its proper divisors (1683064542415).

7638523690865 is a wasteful number, since it uses less digits than its factorization.

7638523690865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25893300711.

The product of its (nonzero) digits is 391910400, while the sum is 68.

The spelling of 7638523690865 in words is "seven trillion, six hundred thirty-eight billion, five hundred twenty-three million, six hundred ninety thousand, eight hundred sixty-five".