61422065635649 has 2 divisors, whose sum is σ = 61422065635650. Its totient is φ = 61422065635648.

The previous prime is 61422065635639. The next prime is 61422065635661. The reversal of 61422065635649 is 94653656022416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61356750633025 + 65315002624 = 7833055^2 + 255568^2 .

It is a cyclic number.

It is not a de Polignac number, because 61422065635649 - 2²⁴ = 61422048858433 is a prime.

It is not a weakly prime, because it can be changed into another prime (61422065635639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30711032817824 + 30711032817825.

It is an arithmetic number, because the mean of its divisors is an integer number (30711032817825).

Almost surely, 2^{61422065635649} is an apocalyptic number.

It is an amenable number.

61422065635649 is a deficient number, since it is larger than the sum of its proper divisors (1).

61422065635649 is an equidigital number, since it uses as much as digits as its factorization.

61422065635649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55987200, while the sum is 59.

The spelling of 61422065635649 in words is "sixty-one trillion, four hundred twenty-two billion, sixty-five million, six hundred thirty-five thousand, six hundred forty-nine".