385709755212 has 36 divisors (see below), whose sum is σ = 975595407696. Its totient is φ = 128489892960.

The previous prime is 385709755199. The next prime is 385709755229. The reversal of 385709755212 is 212557907583.

385709755212 is a `hidden beast` number, since 3 + 8 + 5 + 70 + 9 + 7 + 552 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×385709755212² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3275739 + ... + 3391442.

It is an arithmetic number, because the mean of its divisors is an integer number (27099872436).

Almost surely, 2^385709755212 is an apocalyptic number.

It is an amenable number.

385709755212 is an abundant number, since it is smaller than the sum of its proper divisors (589885652484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385709755212 is a wasteful number, since it uses less digits than its factorization.

385709755212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668798 (or 6668793 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 54.

The spelling of 385709755212 in words is "three hundred eighty-five billion, seven hundred nine million, seven hundred fifty-five thousand, two hundred twelve".