65615501671 has 2 divisors, whose sum is σ = 65615501672. Its totient is φ = 65615501670.

The previous prime is 65615501639. The next prime is 65615501713. The reversal of 65615501671 is 17610551656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65615501671 - 2⁵ = 65615501639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65615501071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32807750835 + 32807750836.

It is an arithmetic number, because the mean of its divisors is an integer number (32807750836).

Almost surely, 2^65615501671 is an apocalyptic number.

65615501671 is a deficient number, since it is larger than the sum of its proper divisors (1).

65615501671 is an equidigital number, since it uses as much as digits as its factorization.

65615501671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 65615501671 in words is "sixty-five billion, six hundred fifteen million, five hundred one thousand, six hundred seventy-one".