378261666518 has 8 divisors (see below), whose sum is σ = 586957758480. Its totient is φ = 182609080360.

The previous prime is 378261666457. The next prime is 378261666529. The reversal of 378261666518 is 815666162873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3260876378 + ... + 3260876493.

It is an arithmetic number, because the mean of its divisors is an integer number (73369719810).

Almost surely, 2^378261666518 is an apocalyptic number.

378261666518 is a deficient number, since it is larger than the sum of its proper divisors (208696091962).

378261666518 is a wasteful number, since it uses less digits than its factorization.

378261666518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521752902.

The product of its digits is 17418240, while the sum is 59.

The spelling of 378261666518 in words is "three hundred seventy-eight billion, two hundred sixty-one million, six hundred sixty-six thousand, five hundred eighteen".