385860561721 has 16 divisors (see below), whose sum is σ = 394525748736. Its totient is φ = 377248824576.

The previous prime is 385860561679. The next prime is 385860561743. The reversal of 385860561721 is 127165068583.

It is a cyclic number.

It is not a de Polignac number, because 385860561721 - 2⁹ = 385860561209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385860511721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19795246 + ... + 19814728.

It is an arithmetic number, because the mean of its divisors is an integer number (24657859296).

Almost surely, 2^385860561721 is an apocalyptic number.

It is an amenable number.

385860561721 is a deficient number, since it is larger than the sum of its proper divisors (8665187015).

385860561721 is a wasteful number, since it uses less digits than its factorization.

385860561721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20832.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 385860561721 in words is "three hundred eighty-five billion, eight hundred sixty million, five hundred sixty-one thousand, seven hundred twenty-one".