61448534663 has 2 divisors, whose sum is σ = 61448534664. Its totient is φ = 61448534662.

The previous prime is 61448534621. The next prime is 61448534699. The reversal of 61448534663 is 36643584416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61448534663 - 2¹⁰ = 61448533639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61448534263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30724267331 + 30724267332.

It is an arithmetic number, because the mean of its divisors is an integer number (30724267332).

Almost surely, 2^61448534663 is an apocalyptic number.

61448534663 is a deficient number, since it is larger than the sum of its proper divisors (1).

61448534663 is an equidigital number, since it uses as much as digits as its factorization.

61448534663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 50.

The spelling of 61448534663 in words is "sixty-one billion, four hundred forty-eight million, five hundred thirty-four thousand, six hundred sixty-three".