65842210091 has 16 divisors (see below), whose sum is σ = 77691187200. Its totient is φ = 54604700640.

The previous prime is 65842210069. The next prime is 65842210099. The reversal of 65842210091 is 19001224856.

It is a de Polignac number, because none of the positive numbers 2^k-65842210091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65842210099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1160810 + ... + 1216208.

It is an arithmetic number, because the mean of its divisors is an integer number (4855699200).

Almost surely, 2^65842210091 is an apocalyptic number.

65842210091 is a deficient number, since it is larger than the sum of its proper divisors (11848977109).

65842210091 is a wasteful number, since it uses less digits than its factorization.

65842210091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60914.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 65842210091 in words is "sixty-five billion, eight hundred forty-two million, two hundred ten thousand, ninety-one".