61378658122265 has 16 divisors (see below), whose sum is σ = 80350418926656. Its totient is φ = 44638926552000.

The previous prime is 61378658122241. The next prime is 61378658122267. The reversal of 61378658122265 is 56222185687316.

It is not a de Polignac number, because 61378658122265 - 2⁸ = 61378658122009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61378658122198 and 61378658122207.

It is not an unprimeable number, because it can be changed into a prime (61378658122267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32664815 + ... + 34492715.

It is an arithmetic number, because the mean of its divisors is an integer number (5021901182916).

Almost surely, 2^{61378658122265} is an apocalyptic number.

It is an amenable number.

61378658122265 is a deficient number, since it is larger than the sum of its proper divisors (18971760804391).

61378658122265 is a wasteful number, since it uses less digits than its factorization.

61378658122265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438440.

The product of its digits is 58060800, while the sum is 62.

The spelling of 61378658122265 in words is "sixty-one trillion, three hundred seventy-eight billion, six hundred fifty-eight million, one hundred twenty-two thousand, two hundred sixty-five".