641646363646151 has 2 divisors, whose sum is σ = 641646363646152. Its totient is φ = 641646363646150.

The previous prime is 641646363646133. The next prime is 641646363646177. The reversal of 641646363646151 is 151646363646146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641646363646151 - 2³⁸ = 641371485739207 is a prime.

It is a super-2 number, since 2×641646363646151² (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 (641646363646111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320823181823075 + 320823181823076.

It is an arithmetic number, because the mean of its divisors is an integer number (320823181823076).

Almost surely, 2^{641646363646151} is an apocalyptic number.

641646363646151 is a deficient number, since it is larger than the sum of its proper divisors (1).

641646363646151 is an equidigital number, since it uses as much as digits as its factorization.

641646363646151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134369280, while the sum is 62.

The spelling of 641646363646151 in words is "six hundred forty-one trillion, six hundred forty-six billion, three hundred sixty-three million, six hundred forty-six thousand, one hundred fifty-one".