385809609645 has 24 divisors (see below), whose sum is σ = 669730374456. Its totient is φ = 205459365888.

The previous prime is 385809609637. The next prime is 385809609659. The reversal of 385809609645 is 546906908583.

385809609645 is a `hidden beast` number, since 3 + 8 + 580 + 9 + 6 + 0 + 9 + 6 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6173716329 + 379635893316 = 78573^2 + 616146^2 .

It is not a de Polignac number, because 385809609645 - 2³ = 385809609637 is a prime.

It is a super-3 number, since 3×385809609645³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6339364 + ... + 6399933.

It is an arithmetic number, because the mean of its divisors is an integer number (27905432269).

Almost surely, 2^385809609645 is an apocalyptic number.

It is an amenable number.

385809609645 is a deficient number, since it is larger than the sum of its proper divisors (283920764811).

385809609645 is a wasteful number, since it uses less digits than its factorization.

385809609645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12739981 (or 12739978 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 385809609645 in words is "three hundred eighty-five billion, eight hundred nine million, six hundred nine thousand, six hundred forty-five".