61488720071 has 2 divisors, whose sum is σ = 61488720072. Its totient is φ = 61488720070.

The previous prime is 61488720023. The next prime is 61488720077. The reversal of 61488720071 is 17002788416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61488720071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61488720077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30744360035 + 30744360036.

It is an arithmetic number, because the mean of its divisors is an integer number (30744360036).

Almost surely, 2^61488720071 is an apocalyptic number.

61488720071 is a deficient number, since it is larger than the sum of its proper divisors (1).

61488720071 is an equidigital number, since it uses as much as digits as its factorization.

61488720071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 61488720071 in words is "sixty-one billion, four hundred eighty-eight million, seven hundred twenty thousand, seventy-one".