65422219944978 has 48 divisors (see below), whose sum is σ = 152684170067520. Its totient is φ = 20125651385952.

The previous prime is 65422219944919. The next prime is 65422219944979. The reversal of 65422219944978 is 87944991222456.

It is a happy number.

65422219944978 is a `hidden beast` number, since 6 + 5 + 4 + 2 + 2 + 21 + 99 + 449 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (65422219944979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28492758 + ... + 30703121.

It is an arithmetic number, because the mean of its divisors is an integer number (3180920209740).

Almost surely, 2^{65422219944978} is an apocalyptic number.

65422219944978 is an abundant number, since it is smaller than the sum of its proper divisors (87261950122542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65422219944978 is a wasteful number, since it uses less digits than its factorization.

65422219944978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59200623 (or 59200620 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 72.

The spelling of 65422219944978 in words is "sixty-five trillion, four hundred twenty-two billion, two hundred nineteen million, nine hundred forty-four thousand, nine hundred seventy-eight".