4991661994 has 16 divisors (see below), whose sum is σ = 8181786816. Its totient is φ = 2265156000.

The previous prime is 4991661991. The next prime is 4991662031.

4991661994 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (4991661991) 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 7 ways as a sum of consecutive naturals, for example, 175542 + ... + 201985.

It is an arithmetic number, because the mean of its divisors is an integer number (511361676).

Almost surely, 2^4991661994 is an apocalyptic number.

4991661994 is a deficient number, since it is larger than the sum of its proper divisors (3190124822).

4991661994 is a wasteful number, since it uses less digits than its factorization.

4991661994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378141.

The product of its digits is 3779136, while the sum is 58.

The square root of 4991661994 is about 70651.6949124365. The cubic root of 4991661994 is about 1709.0248985107.

The spelling of 4991661994 in words is "four billion, nine hundred ninety-one million, six hundred sixty-one thousand, nine hundred ninety-four".