7638385771027 has 4 divisors (see below), whose sum is σ = 8332784477496. Its totient is φ = 6943987064560.

The previous prime is 7638385770989. The next prime is 7638385771061. The reversal of 7638385771027 is 7201775838367.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7638385771027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7638385771027.

It is not an unprimeable number, because it can be changed into a prime (7638385471027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347199353218 + ... + 347199353239.

It is an arithmetic number, because the mean of its divisors is an integer number (2083196119374).

Almost surely, 2^{7638385771027} is an apocalyptic number.

7638385771027 is a deficient number, since it is larger than the sum of its proper divisors (694398706469).

7638385771027 is a wasteful number, since it uses less digits than its factorization.

7638385771027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694398706468.

The product of its (nonzero) digits is 82978560, while the sum is 64.

The spelling of 7638385771027 in words is "seven trillion, six hundred thirty-eight billion, three hundred eighty-five million, seven hundred seventy-one thousand, twenty-seven".