378861665546 has 64 divisors (see below), whose sum is σ = 704952923136. Its totient is φ = 148702003200.

The previous prime is 378861665531. The next prime is 378861665579. The reversal of 378861665546 is 645566168873.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11870666 + ... + 11902538.

It is an arithmetic number, because the mean of its divisors is an integer number (11014889424).

Almost surely, 2^378861665546 is an apocalyptic number.

378861665546 is a deficient number, since it is larger than the sum of its proper divisors (326091257590).

378861665546 is a wasteful number, since it uses less digits than its factorization.

378861665546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32407.

The product of its digits is 174182400, while the sum is 65.

The spelling of 378861665546 in words is "three hundred seventy-eight billion, eight hundred sixty-one million, six hundred sixty-five thousand, five hundred forty-six".