1978044663 has 8 divisors (see below), whose sum is σ = 3014163328. Its totient is φ = 1130311224.

The previous prime is 1978044637. The next prime is 1978044697. The reversal of 1978044663 is 3664408791.

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

It is not a de Polignac number, because 1978044663 - 2⁶ = 1978044599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978043663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47096281 + ... + 47096322.

It is an arithmetic number, because the mean of its divisors is an integer number (376770416).

Almost surely, 2^1978044663 is an apocalyptic number.

1978044663 is a deficient number, since it is larger than the sum of its proper divisors (1036118665).

1978044663 is an equidigital number, since it uses as much as digits as its factorization.

1978044663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94192613.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 1978044663 is about 44475.2140298391. The cubic root of 1978044663 is about 1255.2937441436.

The spelling of 1978044663 in words is "one billion, nine hundred seventy-eight million, forty-four thousand, six hundred sixty-three".