61680619243 has 2 divisors, whose sum is σ = 61680619244. Its totient is φ = 61680619242.

The previous prime is 61680619229. The next prime is 61680619271. The reversal of 61680619243 is 34291608616.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61680619243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61680619193 and 61680619202.

It is not a weakly prime, because it can be changed into another prime (61680611243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30840309621 + 30840309622.

It is an arithmetic number, because the mean of its divisors is an integer number (30840309622).

Almost surely, 2^61680619243 is an apocalyptic number.

61680619243 is a deficient number, since it is larger than the sum of its proper divisors (1).

61680619243 is an equidigital number, since it uses as much as digits as its factorization.

61680619243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 61680619243 in words is "sixty-one billion, six hundred eighty million, six hundred nineteen thousand, two hundred forty-three".