6213607641557 has 2 divisors, whose sum is σ = 6213607641558. Its totient is φ = 6213607641556.

The previous prime is 6213607641509. The next prime is 6213607641581. The reversal of 6213607641557 is 7551467063126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3510523102321 + 2703084539236 = 1873639^2 + 1644106^2 .

It is a cyclic number.

It is not a de Polignac number, because 6213607641557 - 2¹⁰ = 6213607640533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6213607641499 and 6213607641508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6213607631557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3106803820778 + 3106803820779.

It is an arithmetic number, because the mean of its divisors is an integer number (3106803820779).

Almost surely, 2^{6213607641557} is an apocalyptic number.

It is an amenable number.

6213607641557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6213607641557 is an equidigital number, since it uses as much as digits as its factorization.

6213607641557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 6213607641557 in words is "six trillion, two hundred thirteen billion, six hundred seven million, six hundred forty-one thousand, five hundred fifty-seven".