378836446646 has 48 divisors (see below), whose sum is σ = 676653785280. Its totient is φ = 158524082640.

The previous prime is 378836446633. The next prime is 378836446687. The reversal of 378836446646 is 646644638873.

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, 12504665 + ... + 12534923.

It is an arithmetic number, because the mean of its divisors is an integer number (14096953860).

Almost surely, 2^378836446646 is an apocalyptic number.

378836446646 is a deficient number, since it is larger than the sum of its proper divisors (297817338634).

378836446646 is a wasteful number, since it uses less digits than its factorization.

378836446646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33289 (or 33282 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 65.

The spelling of 378836446646 in words is "three hundred seventy-eight billion, eight hundred thirty-six million, four hundred forty-six thousand, six hundred forty-six".