2721550643 has 16 divisors (see below), whose sum is σ = 3169739520. Its totient is φ = 2288378400.

The previous prime is 2721550627. The next prime is 2721550679. The reversal of 2721550643 is 3460551272.

It is not a de Polignac number, because 2721550643 - 2⁴ = 2721550627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2721550613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196073 + ... + 209493.

It is an arithmetic number, because the mean of its divisors is an integer number (198108720).

Almost surely, 2^2721550643 is an apocalyptic number.

2721550643 is a deficient number, since it is larger than the sum of its proper divisors (448188877).

2721550643 is a wasteful number, since it uses less digits than its factorization.

2721550643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13978.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 2721550643 is about 52168.4832346121. The cubic root of 2721550643 is about 1396.1716227768.

The spelling of 2721550643 in words is "two billion, seven hundred twenty-one million, five hundred fifty thousand, six hundred forty-three".