2639556068 has 36 divisors (see below), whose sum is σ = 4942528080. Its totient is φ = 1233132672.

The previous prime is 2639556067. The next prime is 2639556079. The reversal of 2639556068 is 8606559362.

It is a super-2 number, since 2×2639556068² = 13934512472231241248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2639556067) 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 11 ways as a sum of consecutive naturals, for example, 152471 + ... + 168897.

Almost surely, 2^2639556068 is an apocalyptic number.

It is an amenable number.

2639556068 is a deficient number, since it is larger than the sum of its proper divisors (2302972012).

2639556068 is a wasteful number, since it uses less digits than its factorization.

2639556068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16604 (or 16585 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 50.

The square root of 2639556068 is about 51376.6101256204. The cubic root of 2639556068 is about 1382.0071730231.

The spelling of 2639556068 in words is "two billion, six hundred thirty-nine million, five hundred fifty-six thousand, sixty-eight".