2942721641 has 16 divisors (see below), whose sum is σ = 3207973824. Its totient is φ = 2688505344.

The previous prime is 2942721631. The next prime is 2942721643. The reversal of 2942721641 is 1461272492.

It is a cyclic number.

It is not a de Polignac number, because 2942721641 - 2¹⁸ = 2942459497 is a prime.

It is a super-2 number, since 2×2942721641² = 17319221312819465762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2942721595 and 2942721604.

It is not an unprimeable number, because it can be changed into a prime (2942721643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106805 + ... + 131501.

It is an arithmetic number, because the mean of its divisors is an integer number (200498364).

Almost surely, 2^2942721641 is an apocalyptic number.

It is an amenable number.

2942721641 is a deficient number, since it is larger than the sum of its proper divisors (265252183).

2942721641 is a wasteful number, since it uses less digits than its factorization.

2942721641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24920.

The product of its digits is 48384, while the sum is 38.

The square root of 2942721641 is about 54246.8583514290. The cubic root of 2942721641 is about 1433.0116717473.

The spelling of 2942721641 in words is "two billion, nine hundred forty-two million, seven hundred twenty-one thousand, six hundred forty-one".