4989067778 has 4 divisors (see below), whose sum is σ = 7483601670. Its totient is φ = 2494533888.

The previous prime is 4989067771. The next prime is 4989067807. The reversal of 4989067778 is 8777609894.

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

It can be written as a sum of positive squares in only one way, i.e., 4989020689 + 47089 = 70633^2 + 217^2 .

It is not an unprimeable number, because it can be changed into a prime (4989067771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247266943 + ... + 1247266946.

Almost surely, 2^4989067778 is an apocalyptic number.

4989067778 is a deficient number, since it is larger than the sum of its proper divisors (2494533892).

4989067778 is a wasteful number, since it uses less digits than its factorization.

4989067778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494533891.

The product of its (nonzero) digits is 42674688, while the sum is 65.

The square root of 4989067778 is about 70633.3333349064. Note that the first 5 decimals coincide. The cubic root of 4989067778 is about 1708.7287815046.

The spelling of 4989067778 in words is "four billion, nine hundred eighty-nine million, sixty-seven thousand, seven hundred seventy-eight".