378563821620 has 48 divisors (see below), whose sum is σ = 1060473684480. Its totient is φ = 100903211136.

The previous prime is 378563821613. The next prime is 378563821697. The reversal of 378563821620 is 26128365873.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1343515 + ... + 1600674.

It is an arithmetic number, because the mean of its divisors is an integer number (22093201760).

Almost surely, 2^378563821620 is an apocalyptic number.

378563821620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

378563821620 is an abundant number, since it is smaller than the sum of its proper divisors (681909862860).

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

378563821620 is a wasteful number, since it uses less digits than its factorization.

378563821620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946344 (or 2946342 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 378563821620 in words is "three hundred seventy-eight billion, five hundred sixty-three million, eight hundred twenty-one thousand, six hundred twenty".