4251648315557 has 2 divisors, whose sum is σ = 4251648315558. Its totient is φ = 4251648315556.

The previous prime is 4251648315517. The next prime is 4251648315569. The reversal of 4251648315557 is 7555138461524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2190382240036 + 2061266075521 = 1479994^2 + 1435711^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251648315557 - 2⁸ = 4251648315301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4251648315517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125824157778 + 2125824157779.

It is an arithmetic number, because the mean of its divisors is an integer number (2125824157779).

Almost surely, 2^{4251648315557} is an apocalyptic number.

It is an amenable number.

4251648315557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251648315557 is an equidigital number, since it uses as much as digits as its factorization.

4251648315557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160000, while the sum is 56.

The spelling of 4251648315557 in words is "four trillion, two hundred fifty-one billion, six hundred forty-eight million, three hundred fifteen thousand, five hundred fifty-seven".