38649022865 has 4 divisors (see below), whose sum is σ = 46378827444. Its totient is φ = 30919218288.

The previous prime is 38649022817. The next prime is 38649022897. The reversal of 38649022865 is 56822094683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56822094683 = 233 ⋅243871651.

It can be written as a sum of positive squares in 2 ways, for example, as 6759635089 + 31889387776 = 82217^2 + 178576^2 .

It is a cyclic number.

It is not a de Polignac number, because 38649022865 - 2¹² = 38649018769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3864902282 + ... + 3864902291.

It is an arithmetic number, because the mean of its divisors is an integer number (11594706861).

Almost surely, 2^38649022865 is an apocalyptic number.

It is an amenable number.

38649022865 is a deficient number, since it is larger than the sum of its proper divisors (7729804579).

38649022865 is an equidigital number, since it uses as much as digits as its factorization.

38649022865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7729804578.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 38649022865 in words is "thirty-eight billion, six hundred forty-nine million, twenty-two thousand, eight hundred sixty-five".