385726858221 has 16 divisors (see below), whose sum is σ = 522057287808. Its totient is φ = 253280932800.

The previous prime is 385726858183. The next prime is 385726858301. The reversal of 385726858221 is 122858627583.

It is not a de Polignac number, because 385726858221 - 2²⁶ = 385659749357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385726858421) 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 15 ways as a sum of consecutive naturals, for example, 669366 + ... + 1104311.

It is an arithmetic number, because the mean of its divisors is an integer number (32628580488).

Almost surely, 2^385726858221 is an apocalyptic number.

It is an amenable number.

385726858221 is a deficient number, since it is larger than the sum of its proper divisors (136330429587).

385726858221 is a wasteful number, since it uses less digits than its factorization.

385726858221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774772.

The product of its digits is 12902400, while the sum is 57.

The spelling of 385726858221 in words is "three hundred eighty-five billion, seven hundred twenty-six million, eight hundred fifty-eight thousand, two hundred twenty-one".