378261666415 has 8 divisors (see below), whose sum is σ = 461607457680. Its totient is φ = 297480361152.

The previous prime is 378261666379. The next prime is 378261666439. The reversal of 378261666415 is 514666162873.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 378261666415 - 2²⁷ = 378127448687 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641121174 + ... + 641121763.

It is an arithmetic number, because the mean of its divisors is an integer number (57700932210).

Almost surely, 2^378261666415 is an apocalyptic number.

378261666415 is a deficient number, since it is larger than the sum of its proper divisors (83345791265).

378261666415 is a wasteful number, since it uses less digits than its factorization.

378261666415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282243001.

The product of its digits is 8709120, while the sum is 55.

The spelling of 378261666415 in words is "three hundred seventy-eight billion, two hundred sixty-one million, six hundred sixty-six thousand, four hundred fifteen".