4415999978 has 8 divisors (see below), whose sum is σ = 7133538468. Its totient is φ = 2038153824.

The previous prime is 4415999971. The next prime is 4416000031. The reversal of 4415999978 is 8799995144.

It can be written as a sum of positive squares in 2 ways, for example, as 3250938289 + 1165061689 = 57017^2 + 34133^2 .

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 (4415999971) 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 3 ways as a sum of consecutive naturals, for example, 84923051 + ... + 84923102.

Almost surely, 2^4415999978 is an apocalyptic number.

4415999978 is a deficient number, since it is larger than the sum of its proper divisors (2717538490).

4415999978 is a wasteful number, since it uses less digits than its factorization.

4415999978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169846168.

The product of its digits is 29393280, while the sum is 65.

The square root of 4415999978 is about 66452.9907378141. The cubic root of 4415999978 is about 1640.6263691565.

The spelling of 4415999978 in words is "four billion, four hundred fifteen million, nine hundred ninety-nine thousand, nine hundred seventy-eight".