163640430346265 has 16 divisors (see below), whose sum is σ = 198809031512448. Its totient is φ = 129286518806016.

The previous prime is 163640430346249. The next prime is 163640430346303. The reversal of 163640430346265 is 562643034046361.

It is a cyclic number.

It is not a de Polignac number, because 163640430346265 - 2⁴ = 163640430346249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72930584 + ... + 75140873.

It is an arithmetic number, because the mean of its divisors is an integer number (12425564469528).

Almost surely, 2^{163640430346265} is an apocalyptic number.

It is an amenable number.

163640430346265 is a deficient number, since it is larger than the sum of its proper divisors (35168601166183).

163640430346265 is a wasteful number, since it uses less digits than its factorization.

163640430346265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148074208.

The product of its (nonzero) digits is 22394880, while the sum is 53.

The spelling of 163640430346265 in words is "one hundred sixty-three trillion, six hundred forty billion, four hundred thirty million, three hundred forty-six thousand, two hundred sixty-five".