4251563621057 has 2 divisors, whose sum is σ = 4251563621058. Its totient is φ = 4251563621056.

The previous prime is 4251563621051. The next prime is 4251563621113. The reversal of 4251563621057 is 7501263651524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4189979739136 + 61583881921 = 2046944^2 + 248161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4251563621057 is a prime.

It is not a weakly prime, because it can be changed into another prime (4251563621051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125781810528 + 2125781810529.

It is an arithmetic number, because the mean of its divisors is an integer number (2125781810529).

Almost surely, 2^{4251563621057} is an apocalyptic number.

It is an amenable number.

4251563621057 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251563621057 is an equidigital number, since it uses as much as digits as its factorization.

4251563621057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 4251563621057 in words is "four trillion, two hundred fifty-one billion, five hundred sixty-three million, six hundred twenty-one thousand, fifty-seven".