4287740477821 has 2 divisors, whose sum is σ = 4287740477822. Its totient is φ = 4287740477820.

The previous prime is 4287740477809. The next prime is 4287740477833. The reversal of 4287740477821 is 1287740477824.

It is a balanced prime because it is at equal distance from previous prime (4287740477809) and next prime (4287740477833).

It can be written as a sum of positive squares in only one way, i.e., 2911016068900 + 1376724408921 = 1706170^2 + 1173339^2 .

It is a cyclic number.

It is not a de Polignac number, because 4287740477821 - 2⁷ = 4287740477693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4287740477821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4287740477021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2143870238910 + 2143870238911.

It is an arithmetic number, because the mean of its divisors is an integer number (2143870238911).

Almost surely, 2^{4287740477821} is an apocalyptic number.

It is an amenable number.

4287740477821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4287740477821 is an equidigital number, since it uses as much as digits as its factorization.

4287740477821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39337984, while the sum is 61.

The spelling of 4287740477821 in words is "four trillion, two hundred eighty-seven billion, seven hundred forty million, four hundred seventy-seven thousand, eight hundred twenty-one".