3958777128779 has 16 divisors (see below), whose sum is σ = 4386590816256. Its totient is φ = 3542448571200.

The previous prime is 3958777128703. The next prime is 3958777128793. The reversal of 3958777128779 is 9778217778593.

3958777128779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3958777128779 - 2¹⁶ = 3958777063243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3958777128079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3625787 + ... + 4589540.

It is an arithmetic number, because the mean of its divisors is an integer number (274161926016).

Almost surely, 2^{3958777128779} is an apocalyptic number.

3958777128779 is a deficient number, since it is larger than the sum of its proper divisors (427813687477).

3958777128779 is a wasteful number, since it uses less digits than its factorization.

3958777128779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216026.

The product of its digits is 2613824640, while the sum is 80.

The spelling of 3958777128779 in words is "three trillion, nine hundred fifty-eight billion, seven hundred seventy-seven million, one hundred twenty-eight thousand, seven hundred seventy-nine".