65809406307688 has 16 divisors (see below), whose sum is σ = 125484037452000. Its totient is φ = 32346996320496.

The previous prime is 65809406307661. The next prime is 65809406307763. The reversal of 65809406307688 is 88670360490856.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69713353668 + ... + 69713354611.

It is an arithmetic number, because the mean of its divisors is an integer number (7842752340750).

Almost surely, 2^{65809406307688} is an apocalyptic number.

It is an amenable number.

65809406307688 is a deficient number, since it is larger than the sum of its proper divisors (59674631144312).

65809406307688 is a wasteful number, since it uses less digits than its factorization.

65809406307688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139426708344 (or 139426708340 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 70.

The spelling of 65809406307688 in words is "sixty-five trillion, eight hundred nine billion, four hundred six million, three hundred seven thousand, six hundred eighty-eight".