65303620021 has 16 divisors (see below), whose sum is σ = 72635616000. Its totient is φ = 58395344128.

The previous prime is 65303620009. The next prime is 65303620033. The reversal of 65303620021 is 12002630356.

It is an interprime number because it is at equal distance from previous prime (65303620009) and next prime (65303620033).

It is a cyclic number.

It is not a de Polignac number, because 65303620021 - 2¹⁵ = 65303587253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65303620721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502201 + ... + 618718.

It is an arithmetic number, because the mean of its divisors is an integer number (4539726000).

Almost surely, 2^65303620021 is an apocalyptic number.

It is an amenable number.

65303620021 is a deficient number, since it is larger than the sum of its proper divisors (7331995979).

65303620021 is a wasteful number, since it uses less digits than its factorization.

65303620021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121108.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 65303620021 in words is "sixty-five billion, three hundred three million, six hundred twenty thousand, twenty-one".