602621254305661 has 2 divisors, whose sum is σ = 602621254305662. Its totient is φ = 602621254305660.

The previous prime is 602621254305643. The next prime is 602621254305671. The reversal of 602621254305661 is 166503452126206.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316106388743161 + 286514865562500 = 17779381^2 + 16926750^2 .

It is a cyclic number.

It is not a de Polignac number, because 602621254305661 - 2³⁷ = 602483815352189 is a prime.

It is a super-2 number, since 2×602621254305661² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (602621254305671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301310627152830 + 301310627152831.

It is an arithmetic number, because the mean of its divisors is an integer number (301310627152831).

Almost surely, 2^{602621254305661} is an apocalyptic number.

It is an amenable number.

602621254305661 is a deficient number, since it is larger than the sum of its proper divisors (1).

602621254305661 is an equidigital number, since it uses as much as digits as its factorization.

602621254305661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 602621254305661 in words is "six hundred two trillion, six hundred twenty-one billion, two hundred fifty-four million, three hundred five thousand, six hundred sixty-one".