6201577147721 has 2 divisors, whose sum is σ = 6201577147722. Its totient is φ = 6201577147720.

The previous prime is 6201577147681. The next prime is 6201577147741. The reversal of 6201577147721 is 1277417751026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5957675497225 + 243901650496 = 2440835^2 + 493864^2 .

It is a cyclic number.

It is not a de Polignac number, because 6201577147721 - 2⁴² = 1803530636617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6201577147721.

It is not a weakly prime, because it can be changed into another prime (6201577147741) 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, 3100788573860 + 3100788573861.

It is an arithmetic number, because the mean of its divisors is an integer number (3100788573861).

Almost surely, 2^{6201577147721} is an apocalyptic number.

It is an amenable number.

6201577147721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6201577147721 is an equidigital number, since it uses as much as digits as its factorization.

6201577147721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152480, while the sum is 50.

The spelling of 6201577147721 in words is "six trillion, two hundred one billion, five hundred seventy-seven million, one hundred forty-seven thousand, seven hundred twenty-one".