201620403065 has 8 divisors (see below), whose sum is σ = 241951969728. Its totient is φ = 161291331760.

The previous prime is 201620403037. The next prime is 201620403091. The reversal of 201620403065 is 560304026102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201620403065 - 2⁶ = 201620403001 is a prime.

It is a super-2 number, since 2×201620403065² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441221 + ... + 773250.

It is an arithmetic number, because the mean of its divisors is an integer number (30243996216).

Almost surely, 2^201620403065 is an apocalyptic number.

It is an amenable number.

201620403065 is a deficient number, since it is larger than the sum of its proper divisors (40331566663).

201620403065 is a wasteful number, since it uses less digits than its factorization.

201620403065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247679.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 201620403065 its reverse (560304026102), we get a palindrome (761924429167).

The spelling of 201620403065 in words is "two hundred one billion, six hundred twenty million, four hundred three thousand, sixty-five".