38778464453784 has 96 divisors (see below), whose sum is σ = 106783125120000. Its totient is φ = 11726516950720.

The previous prime is 38778464453747. The next prime is 38778464453803. The reversal of 38778464453784 is 48735446487783.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12547884 + ... + 15329915.

It is an arithmetic number, because the mean of its divisors is an integer number (1112324220000).

Almost surely, 2^{38778464453784} is an apocalyptic number.

It is an amenable number.

38778464453784 is an abundant number, since it is smaller than the sum of its proper divisors (68004660666216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38778464453784 is a wasteful number, since it uses less digits than its factorization.

38778464453784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27878309 (or 27878294 counting only the distinct ones).

The product of its digits is 12138577920, while the sum is 78.

The spelling of 38778464453784 in words is "thirty-eight trillion, seven hundred seventy-eight billion, four hundred sixty-four million, four hundred fifty-three thousand, seven hundred eighty-four".