61316555561269 has 2 divisors, whose sum is σ = 61316555561270. Its totient is φ = 61316555561268.

The previous prime is 61316555561267. The next prime is 61316555561323. The reversal of 61316555561269 is 96216555561316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56184948818244 + 5131606743025 = 7495662^2 + 2265305^2 .

It is a cyclic number.

It is not a de Polignac number, because 61316555561269 - 2¹ = 61316555561267 is a prime.

It is a super-2 number, since 2×61316555561269² (a number of 28 digits) contains 22 as substring.

Together with 61316555561267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61316555561267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30658277780634 + 30658277780635.

It is an arithmetic number, because the mean of its divisors is an integer number (30658277780635).

Almost surely, 2^{61316555561269} is an apocalyptic number.

It is an amenable number.

61316555561269 is a deficient number, since it is larger than the sum of its proper divisors (1).

61316555561269 is an equidigital number, since it uses as much as digits as its factorization.

61316555561269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740000, while the sum is 61.

The spelling of 61316555561269 in words is "sixty-one trillion, three hundred sixteen billion, five hundred fifty-five million, five hundred sixty-one thousand, two hundred sixty-nine".