61840642763 has 2 divisors, whose sum is σ = 61840642764. Its totient is φ = 61840642762.

The previous prime is 61840642727. The next prime is 61840642771. The reversal of 61840642763 is 36724604816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61840642763 - 2¹⁸ = 61840380619 is a prime.

It is not a weakly prime, because it can be changed into another prime (61840642723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920321381 + 30920321382.

It is an arithmetic number, because the mean of its divisors is an integer number (30920321382).

Almost surely, 2^61840642763 is an apocalyptic number.

61840642763 is a deficient number, since it is larger than the sum of its proper divisors (1).

61840642763 is an equidigital number, since it uses as much as digits as its factorization.

61840642763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 61840642763 in words is "sixty-one billion, eight hundred forty million, six hundred forty-two thousand, seven hundred sixty-three".