378816005643 has 4 divisors (see below), whose sum is σ = 505088007528. Its totient is φ = 252544003760.

The previous prime is 378816005639. The next prime is 378816005647. The reversal of 378816005643 is 346500618873.

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

It is an interprime number because it is at equal distance from previous prime (378816005639) and next prime (378816005647).

It is a cyclic number.

It is not a de Polignac number, because 378816005643 - 2² = 378816005639 is a prime.

It is a super-2 number, since 2×378816005643² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378816005647) 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, 63136000938 + ... + 63136000943.

It is an arithmetic number, because the mean of its divisors is an integer number (126272001882).

Almost surely, 2^378816005643 is an apocalyptic number.

378816005643 is a deficient number, since it is larger than the sum of its proper divisors (126272001885).

378816005643 is a wasteful number, since it uses less digits than its factorization.

378816005643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126272001884.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 378816005643 in words is "three hundred seventy-eight billion, eight hundred sixteen million, five thousand, six hundred forty-three".