620044846841551 has 2 divisors, whose sum is σ = 620044846841552. Its totient is φ = 620044846841550.

The previous prime is 620044846841507. The next prime is 620044846841611. The reversal of 620044846841551 is 155148648440026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620044846841551 - 2⁴⁷ = 479307358486223 is a prime.

It is a super-2 number, since 2×620044846841551² (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 (620044846841051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310022423420775 + 310022423420776.

It is an arithmetic number, because the mean of its divisors is an integer number (310022423420776).

Almost surely, 2^{620044846841551} is an apocalyptic number.

620044846841551 is a deficient number, since it is larger than the sum of its proper divisors (1).

620044846841551 is an equidigital number, since it uses as much as digits as its factorization.

620044846841551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29491200, while the sum is 58.

The spelling of 620044846841551 in words is "six hundred twenty trillion, forty-four billion, eight hundred forty-six million, eight hundred forty-one thousand, five hundred fifty-one".