394668777075 has 96 divisors (see below), whose sum is σ = 679777920000. Its totient is φ = 201804771840.

The previous prime is 394668777067. The next prime is 394668777077. The reversal of 394668777075 is 570777866493.

It is not a de Polignac number, because 394668777075 - 2³ = 394668777067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394668777077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 210040986 + ... + 210042864.

It is an arithmetic number, because the mean of its divisors is an integer number (7081020000).

Almost surely, 2^394668777075 is an apocalyptic number.

394668777075 is a deficient number, since it is larger than the sum of its proper divisors (285109142925).

394668777075 is a wasteful number, since it uses less digits than its factorization.

394668777075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549 (or 2544 counting only the distinct ones).

The product of its (nonzero) digits is 373403520, while the sum is 69.

The spelling of 394668777075 in words is "three hundred ninety-four billion, six hundred sixty-eight million, seven hundred seventy-seven thousand, seventy-five".