385623478791 has 12 divisors (see below), whose sum is σ = 557059873032. Its totient is φ = 257060081616.

The previous prime is 385623478789. The next prime is 385623478873. The reversal of 385623478791 is 197874326583.

385623478791 is a `hidden beast` number, since 3 + 8 + 56 + 23 + 478 + 7 + 91 = 666.

It is not a de Polignac number, because 385623478791 - 2¹ = 385623478789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385623471791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1742961 + ... + 1951706.

It is an arithmetic number, because the mean of its divisors is an integer number (46421656086).

Almost surely, 2^385623478791 is an apocalyptic number.

385623478791 is a deficient number, since it is larger than the sum of its proper divisors (171436394241).

385623478791 is a wasteful number, since it uses less digits than its factorization.

385623478791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3706270 (or 3706267 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 385623478791 in words is "three hundred eighty-five billion, six hundred twenty-three million, four hundred seventy-eight thousand, seven hundred ninety-one".