620161554236513 has 2 divisors, whose sum is σ = 620161554236514. Its totient is φ = 620161554236512.

The previous prime is 620161554236467. The next prime is 620161554236599. The reversal of 620161554236513 is 315632455161026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351676059168784 + 268485495067729 = 18753028^2 + 16385527^2 .

It is a cyclic number.

It is not a de Polignac number, because 620161554236513 - 2⁶ = 620161554236449 is a prime.

It is not a weakly prime, because it can be changed into another prime (620161554232513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310080777118256 + 310080777118257.

It is an arithmetic number, because the mean of its divisors is an integer number (310080777118257).

Almost surely, 2^{620161554236513} is an apocalyptic number.

It is an amenable number.

620161554236513 is a deficient number, since it is larger than the sum of its proper divisors (1).

620161554236513 is an equidigital number, since it uses as much as digits as its factorization.

620161554236513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 620161554236513 in words is "six hundred twenty trillion, one hundred sixty-one billion, five hundred fifty-four million, two hundred thirty-six thousand, five hundred thirteen".