61442642103266 has 8 divisors (see below), whose sum is σ = 97585372752300. Its totient is φ = 28914184519168.

The previous prime is 61442642103251. The next prime is 61442642103277. The reversal of 61442642103266 is 66230124624416.

It can be written as a sum of positive squares in 2 ways, for example, as 61016735765041 + 425906338225 = 7811321^2 + 652615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61442642103266.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903568266191 + ... + 903568266258.

Almost surely, 2^{61442642103266} is an apocalyptic number.

61442642103266 is a deficient number, since it is larger than the sum of its proper divisors (36142730649034).

61442642103266 is a wasteful number, since it uses less digits than its factorization.

61442642103266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807136532468.

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 61442642103266 in words is "sixty-one trillion, four hundred forty-two billion, six hundred forty-two million, one hundred three thousand, two hundred sixty-six".