643653153125377 has 2 divisors, whose sum is σ = 643653153125378. Its totient is φ = 643653153125376.

The previous prime is 643653153125309. The next prime is 643653153125441. The reversal of 643653153125377 is 773521351356346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630331521811216 + 13321631314161 = 25106404^2 + 3649881^2 .

It is a cyclic number.

It is not a de Polignac number, because 643653153125377 - 2¹¹ = 643653153123329 is a prime.

It is not a weakly prime, because it can be changed into another prime (643653153125077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321826576562688 + 321826576562689.

It is an arithmetic number, because the mean of its divisors is an integer number (321826576562689).

Almost surely, 2^{643653153125377} is an apocalyptic number.

It is an amenable number.

643653153125377 is a deficient number, since it is larger than the sum of its proper divisors (1).

643653153125377 is an equidigital number, since it uses as much as digits as its factorization.

643653153125377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884000, while the sum is 61.

The spelling of 643653153125377 in words is "six hundred forty-three trillion, six hundred fifty-three billion, one hundred fifty-three million, one hundred twenty-five thousand, three hundred seventy-seven".