39986880779 has 2 divisors, whose sum is σ = 39986880780. Its totient is φ = 39986880778.

The previous prime is 39986880767. The next prime is 39986880793. The reversal of 39986880779 is 97708868993.

39986880779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39986880779 - 2⁴ = 39986880763 is a prime.

It is not a weakly prime, because it can be changed into another prime (39986888779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19993440389 + 19993440390.

It is an arithmetic number, because the mean of its divisors is an integer number (19993440390).

Almost surely, 2^39986880779 is an apocalyptic number.

39986880779 is a deficient number, since it is larger than the sum of its proper divisors (1).

39986880779 is an equidigital number, since it uses as much as digits as its factorization.

39986880779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329204736, while the sum is 74.

The spelling of 39986880779 in words is "thirty-nine billion, nine hundred eighty-six million, eight hundred eighty thousand, seven hundred seventy-nine".