64615363205461 has 2 divisors, whose sum is σ = 64615363205462. Its totient is φ = 64615363205460.

The previous prime is 64615363205443. The next prime is 64615363205539. The reversal of 64615363205461 is 16450236351646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64366443036900 + 248920168561 = 8022870^2 + 498919^2 .

It is a cyclic number.

It is not a de Polignac number, because 64615363205461 - 2⁹ = 64615363204949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64615363205399 and 64615363205408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64615363205431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32307681602730 + 32307681602731.

It is an arithmetic number, because the mean of its divisors is an integer number (32307681602731).

Almost surely, 2^{64615363205461} is an apocalyptic number.

It is an amenable number.

64615363205461 is a deficient number, since it is larger than the sum of its proper divisors (1).

64615363205461 is an equidigital number, since it uses as much as digits as its factorization.

64615363205461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 64615363205461 in words is "sixty-four trillion, six hundred fifteen billion, three hundred sixty-three million, two hundred five thousand, four hundred sixty-one".