4506591978 has 56 divisors (see below), whose sum is σ = 11583106848. Its totient is φ = 1287594792.

The previous prime is 4506591959. The next prime is 4506592003. The reversal of 4506591978 is 8791956054.

4506591978 is a `hidden beast` number, since 4 + 506 + 59 + 19 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 210576 + ... + 230987.

Almost surely, 2^4506591978 is an apocalyptic number.

4506591978 is an abundant number, since it is smaller than the sum of its proper divisors (7076514870).

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

4506591978 is an equidigital number, since it uses as much as digits as its factorization.

4506591978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441590 (or 441575 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 4506591978 is about 67131.1550474145. The cubic root of 4506591978 is about 1651.7693878580.

The spelling of 4506591978 in words is "four billion, five hundred six million, five hundred ninety-one thousand, nine hundred seventy-eight".