422765851978 has 8 divisors (see below), whose sum is σ = 635821994880. Its totient is φ = 210825187020.

The previous prime is 422765851943. The next prime is 422765851979. The reversal of 422765851978 is 879158567224.

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

It is not an unprimeable number, because it can be changed into a prime (422765851979) 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, 278868538 + ... + 278870053.

It is an arithmetic number, because the mean of its divisors is an integer number (79477749360).

Almost surely, 2^422765851978 is an apocalyptic number.

422765851978 is a deficient number, since it is larger than the sum of its proper divisors (213056142902).

422765851978 is a wasteful number, since it uses less digits than its factorization.

422765851978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557738972.

The product of its digits is 67737600, while the sum is 64.

The spelling of 422765851978 in words is "four hundred twenty-two billion, seven hundred sixty-five million, eight hundred fifty-one thousand, nine hundred seventy-eight".