4891974478 has 4 divisors (see below), whose sum is σ = 7337961720. Its totient is φ = 2445987238.

The previous prime is 4891974467. The next prime is 4891974481. The reversal of 4891974478 is 8744791984.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1222993618 + ... + 1222993621.

It is an arithmetic number, because the mean of its divisors is an integer number (1834490430).

Almost surely, 2^4891974478 is an apocalyptic number.

4891974478 is a deficient number, since it is larger than the sum of its proper divisors (2445987242).

4891974478 is a wasteful number, since it uses less digits than its factorization.

4891974478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445987241.

The product of its digits is 16257024, while the sum is 61.

The square root of 4891974478 is about 69942.6513509461. The cubic root of 4891974478 is about 1697.5714432636.

The spelling of 4891974478 in words is "four billion, eight hundred ninety-one million, nine hundred seventy-four thousand, four hundred seventy-eight".