378933489649 has 16 divisors (see below), whose sum is σ = 446003578944. Its totient is φ = 317398305600.

The previous prime is 378933489647. The next prime is 378933489677. The reversal of 378933489649 is 946984339873.

It is a cyclic number.

It is not a de Polignac number, because 378933489649 - 2¹ = 378933489647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378933489643) 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, 2371699 + ... + 2526424.

It is an arithmetic number, because the mean of its divisors is an integer number (27875223684).

Almost surely, 2^378933489649 is an apocalyptic number.

It is an amenable number.

378933489649 is a deficient number, since it is larger than the sum of its proper divisors (67070089295).

378933489649 is a wasteful number, since it uses less digits than its factorization.

378933489649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898688.

The product of its digits is 846526464, while the sum is 73.

The spelling of 378933489649 in words is "three hundred seventy-eight billion, nine hundred thirty-three million, four hundred eighty-nine thousand, six hundred forty-nine".