2956640021 has 2 divisors, whose sum is σ = 2956640022. Its totient is φ = 2956640020.

The previous prime is 2956640003. The next prime is 2956640039. The reversal of 2956640021 is 1200466592.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2956640003) and next prime (2956640039).

It can be written as a sum of positive squares in only one way, i.e., 2142393796 + 814246225 = 46286^2 + 28535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2956640021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2956640321) 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 as a sum of consecutive naturals, namely, 1478320010 + 1478320011.

It is an arithmetic number, because the mean of its divisors is an integer number (1478320011).

Almost surely, 2^2956640021 is an apocalyptic number.

It is an amenable number.

2956640021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2956640021 is an equidigital number, since it uses as much as digits as its factorization.

2956640021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2956640021 is about 54374.9944459767. The cubic root of 2956640021 is about 1435.2673883279.

The spelling of 2956640021 in words is "two billion, nine hundred fifty-six million, six hundred forty thousand, twenty-one".