61768000193 has 4 divisors (see below), whose sum is σ = 61848323460. Its totient is φ = 61687676928.

The previous prime is 61768000183. The next prime is 61768000241. The reversal of 61768000193 is 39100086716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27791557264 + 33976442929 = 166708^2 + 184327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61768000193 is a prime.

It is a Duffinian number.

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 61768000193.

It is not an unprimeable number, because it can be changed into a prime (61768000153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40160480 + ... + 40162017.

It is an arithmetic number, because the mean of its divisors is an integer number (15462080865).

Almost surely, 2^61768000193 is an apocalyptic number.

It is an amenable number.

61768000193 is a deficient number, since it is larger than the sum of its proper divisors (80323267).

61768000193 is an equidigital number, since it uses as much as digits as its factorization.

61768000193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80323266.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 61768000193 in words is "sixty-one billion, seven hundred sixty-eight million, one hundred ninety-three", and thus it is an aban number.