378857127617 has 4 divisors (see below), whose sum is σ = 379471159236. Its totient is φ = 378243096000.

The previous prime is 378857127611. The next prime is 378857127653. The reversal of 378857127617 is 716721758873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63542309776 + 315314817841 = 252076^2 + 561529^2 .

It is a cyclic number.

It is not a de Polignac number, because 378857127617 - 2⁸ = 378857127361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378857127617.

It is not an unprimeable number, because it can be changed into a prime (378857127611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307014884 + ... + 307016117.

It is an arithmetic number, because the mean of its divisors is an integer number (94867789809).

Almost surely, 2^378857127617 is an apocalyptic number.

It is an amenable number.

378857127617 is a deficient number, since it is larger than the sum of its proper divisors (614031619).

378857127617 is an equidigital number, since it uses as much as digits as its factorization.

378857127617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614031618.

The product of its digits is 27659520, while the sum is 62.

The spelling of 378857127617 in words is "three hundred seventy-eight billion, eight hundred fifty-seven million, one hundred twenty-seven thousand, six hundred seventeen".