38678403566749 has 4 divisors (see below), whose sum is σ = 39223169814240. Its totient is φ = 38133637319260.

The previous prime is 38678403566723. The next prime is 38678403566807. The reversal of 38678403566749 is 94766530487683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38678403566749 - 2⁵ = 38678403566717 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 (38678403566849) 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 3 ways as a sum of consecutive naturals, for example, 272383123639 + ... + 272383123780.

It is an arithmetic number, because the mean of its divisors is an integer number (9805792453560).

Almost surely, 2^{38678403566749} is an apocalyptic number.

It is an amenable number.

38678403566749 is a deficient number, since it is larger than the sum of its proper divisors (544766247491).

38678403566749 is an equidigital number, since it uses as much as digits as its factorization.

38678403566749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544766247490.

The product of its (nonzero) digits is 4389396480, while the sum is 76.

The spelling of 38678403566749 in words is "thirty-eight trillion, six hundred seventy-eight billion, four hundred three million, five hundred sixty-six thousand, seven hundred forty-nine".