4991908436 has 12 divisors (see below), whose sum is σ = 8822333940. Its totient is φ = 2471241600.

The previous prime is 4991908429. The next prime is 4991908447. The reversal of 4991908436 is 6348091994.

It can be written as a sum of positive squares in 2 ways, for example, as 2988808900 + 2003099536 = 54670^2 + 44756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6177701 + ... + 6178508.

It is an arithmetic number, because the mean of its divisors is an integer number (735194495).

Almost surely, 2^4991908436 is an apocalyptic number.

It is an amenable number.

4991908436 is a deficient number, since it is larger than the sum of its proper divisors (3830425504).

4991908436 is a wasteful number, since it uses less digits than its factorization.

4991908436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12356314 (or 12356312 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 4991908436 is about 70653.4389538117. The cubic root of 4991908436 is about 1709.0530233172.

The spelling of 4991908436 in words is "four billion, nine hundred ninety-one million, nine hundred eight thousand, four hundred thirty-six".