39081386778 has 48 divisors (see below), whose sum is σ = 91385721504. Its totient is φ = 11109413280.

The previous prime is 39081386777. The next prime is 39081386801. The reversal of 39081386778 is 87768318093.

It is not an unprimeable number, because it can be changed into a prime (39081386777) 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 23 ways as a sum of consecutive naturals, for example, 279468 + ... + 395303.

It is an arithmetic number, because the mean of its divisors is an integer number (1903869198).

Almost surely, 2^39081386778 is an apocalyptic number.

39081386778 is an abundant number, since it is smaller than the sum of its proper divisors (52304334726).

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

39081386778 is a wasteful number, since it uses less digits than its factorization.

39081386778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674987 (or 674980 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 39081386778 in words is "thirty-nine billion, eighty-one million, three hundred eighty-six thousand, seven hundred seventy-eight".