378855221856 has 48 divisors (see below), whose sum is σ = 1003789329984. Its totient is φ = 125104836224.

The previous prime is 378855221839. The next prime is 378855221891. The reversal of 378855221856 is 658122558873.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 378855221856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18430890 + ... + 18451433.

It is an arithmetic number, because the mean of its divisors is an integer number (20912277708).

Almost surely, 2^378855221856 is an apocalyptic number.

It is an amenable number.

378855221856 is an abundant number, since it is smaller than the sum of its proper divisors (624934108128).

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

378855221856 is a wasteful number, since it uses less digits than its factorization.

378855221856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36882443 (or 36882435 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 60.

The spelling of 378855221856 in words is "three hundred seventy-eight billion, eight hundred fifty-five million, two hundred twenty-one thousand, eight hundred fifty-six".