38782655647 has 4 divisors (see below), whose sum is σ = 38930118480. Its totient is φ = 38635192816.

The previous prime is 38782655573. The next prime is 38782655651. The reversal of 38782655647 is 74655628783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74655628783 = 29 ⋅2574332027.

It is a cyclic number.

It is not a de Polignac number, because 38782655647 - 2⁷ = 38782655519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38782655687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73731022 + ... + 73731547.

It is an arithmetic number, because the mean of its divisors is an integer number (9732529620).

Almost surely, 2^38782655647 is an apocalyptic number.

38782655647 is a deficient number, since it is larger than the sum of its proper divisors (147462833).

38782655647 is a wasteful number, since it uses less digits than its factorization.

38782655647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147462832.

The product of its digits is 67737600, while the sum is 61.

The spelling of 38782655647 in words is "thirty-eight billion, seven hundred eighty-two million, six hundred fifty-five thousand, six hundred forty-seven".