378836446647 has 16 divisors (see below), whose sum is σ = 521627863040. Its totient is φ = 244308160800.

The previous prime is 378836446633. The next prime is 378836446687. The reversal of 378836446647 is 746644638873.

It is not a de Polignac number, because 378836446647 - 2¹⁶ = 378836381111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378836446687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630379 + ... + 1074732.

It is an arithmetic number, because the mean of its divisors is an integer number (32601741440).

Almost surely, 2^378836446647 is an apocalyptic number.

378836446647 is a deficient number, since it is larger than the sum of its proper divisors (142791416393).

378836446647 is a wasteful number, since it uses less digits than its factorization.

378836446647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707534.

The product of its digits is 390168576, while the sum is 66.

The spelling of 378836446647 in words is "three hundred seventy-eight billion, eight hundred thirty-six million, four hundred forty-six thousand, six hundred forty-seven".