385961029891 has 4 divisors (see below), whose sum is σ = 385962731784. Its totient is φ = 385959328000.

The previous prime is 385961029871. The next prime is 385961029901. The reversal of 385961029891 is 198920169583.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385961029891 - 2⁷ = 385961029763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385961029871) 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 3 ways as a sum of consecutive naturals, for example, 446785 + ... + 985666.

It is an arithmetic number, because the mean of its divisors is an integer number (96490682946).

Almost surely, 2^385961029891 is an apocalyptic number.

385961029891 is a deficient number, since it is larger than the sum of its proper divisors (1701893).

385961029891 is a wasteful number, since it uses less digits than its factorization.

385961029891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701892.

The product of its (nonzero) digits is 8398080, while the sum is 61.

The spelling of 385961029891 in words is "three hundred eighty-five billion, nine hundred sixty-one million, twenty-nine thousand, eight hundred ninety-one".