385291826641 has 2 divisors, whose sum is σ = 385291826642. Its totient is φ = 385291826640.

The previous prime is 385291826617. The next prime is 385291826663. The reversal of 385291826641 is 146628192583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383780250000 + 1511576641 = 619500^2 + 38879^2 .

It is a cyclic number.

It is not a de Polignac number, because 385291826641 - 2⁵ = 385291826609 is a prime.

It is not a weakly prime, because it can be changed into another prime (385291826341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192645913320 + 192645913321.

It is an arithmetic number, because the mean of its divisors is an integer number (192645913321).

Almost surely, 2^385291826641 is an apocalyptic number.

It is an amenable number.

385291826641 is a deficient number, since it is larger than the sum of its proper divisors (1).

385291826641 is an equidigital number, since it uses as much as digits as its factorization.

385291826641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 55.

The spelling of 385291826641 in words is "three hundred eighty-five billion, two hundred ninety-one million, eight hundred twenty-six thousand, six hundred forty-one".