38919681506 has 16 divisors (see below), whose sum is σ = 59489123328. Its totient is φ = 19092765600.

The previous prime is 38919681499. The next prime is 38919681509. The reversal of 38919681506 is 60518691983.

It is not an unprimeable number, because it can be changed into a prime (38919681509) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 669950 + ... + 725721.

It is an arithmetic number, because the mean of its divisors is an integer number (3718070208).

Almost surely, 2^38919681506 is an apocalyptic number.

38919681506 is a deficient number, since it is larger than the sum of its proper divisors (20569441822).

38919681506 is a wasteful number, since it uses less digits than its factorization.

38919681506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395937.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 38919681506 in words is "thirty-eight billion, nine hundred nineteen million, six hundred eighty-one thousand, five hundred six".