4648977978 has 32 divisors (see below), whose sum is σ = 9344669760. Its totient is φ = 1541890560.

The previous prime is 4648977959. The next prime is 4648977979. The reversal of 4648977978 is 8797798464.

It is a super-2 number, since 2×4648977978² = 43225992479857936968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4648977979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1542493 + ... + 1545503.

It is an arithmetic number, because the mean of its divisors is an integer number (292020930).

Almost surely, 2^4648977978 is an apocalyptic number.

4648977978 is an abundant number, since it is smaller than the sum of its proper divisors (4695691782).

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

4648977978 is a wasteful number, since it uses less digits than its factorization.

4648977978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222.

The product of its digits is 170698752, while the sum is 69.

The square root of 4648977978 is about 68183.4142442280. The cubic root of 4648977978 is about 1668.9852415019.

The spelling of 4648977978 in words is "four billion, six hundred forty-eight million, nine hundred seventy-seven thousand, nine hundred seventy-eight".