4654821978 has 24 divisors (see below), whose sum is σ = 10458983808. Its totient is φ = 1551607164.

The previous prime is 4654821971. The next prime is 4654821979. The reversal of 4654821978 is 8791284564.

It is a happy number.

4654821978 is a `hidden beast` number, since 4 + 6 + 548 + 2 + 1 + 97 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (4654821971) 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 11 ways as a sum of consecutive naturals, for example, 4788426 + ... + 4789397.

It is an arithmetic number, because the mean of its divisors is an integer number (435790992).

Almost surely, 2^4654821978 is an apocalyptic number.

4654821978 is an abundant number, since it is smaller than the sum of its proper divisors (5804161830).

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

4654821978 is an equidigital number, since it uses as much as digits as its factorization.

4654821978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577840 (or 9577828 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 4654821978 is about 68226.2557817736. The cubic root of 4654821978 is about 1669.6842815739.

The spelling of 4654821978 in words is "four billion, six hundred fifty-four million, eight hundred twenty-one thousand, nine hundred seventy-eight".