385188568561 has 16 divisors (see below), whose sum is σ = 399706453440. Its totient is φ = 370905912000.

The previous prime is 385188568553. The next prime is 385188568603. The reversal of 385188568561 is 165865881583.

It is a cyclic number.

It is not a de Polignac number, because 385188568561 - 2³ = 385188568553 is a prime.

It is a super-2 number, since 2×385188568561² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 385188568493 and 385188568502.

It is not an unprimeable number, because it can be changed into a prime (385188565561) 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, 1325970 + ... + 1590148.

It is an arithmetic number, because the mean of its divisors is an integer number (24981653340).

Almost surely, 2^385188568561 is an apocalyptic number.

It is an amenable number.

385188568561 is a deficient number, since it is larger than the sum of its proper divisors (14517884879).

385188568561 is a wasteful number, since it uses less digits than its factorization.

385188568561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264624.

The product of its digits is 55296000, while the sum is 64.

The spelling of 385188568561 in words is "three hundred eighty-five billion, one hundred eighty-eight million, five hundred sixty-eight thousand, five hundred sixty-one".