65620764321 has 8 divisors (see below), whose sum is σ = 99993545664. Its totient is φ = 37497579600.

The previous prime is 65620764283. The next prime is 65620764359. The reversal of 65620764321 is 12346702656.

It is an interprime number because it is at equal distance from previous prime (65620764283) and next prime (65620764359).

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

It is not a de Polignac number, because 65620764321 - 2⁷ = 65620764193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65620764221) 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 7 ways as a sum of consecutive naturals, for example, 1562399130 + ... + 1562399171.

It is an arithmetic number, because the mean of its divisors is an integer number (12499193208).

Almost surely, 2^65620764321 is an apocalyptic number.

It is an amenable number.

65620764321 is a deficient number, since it is larger than the sum of its proper divisors (34372781343).

65620764321 is a wasteful number, since it uses less digits than its factorization.

65620764321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124798311.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 65620764321 in words is "sixty-five billion, six hundred twenty million, seven hundred sixty-four thousand, three hundred twenty-one".