65551636643 has 2 divisors, whose sum is σ = 65551636644. Its totient is φ = 65551636642.

The previous prime is 65551636639. The next prime is 65551636697. The reversal of 65551636643 is 34663615556.

65551636643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65551636643 - 2² = 65551636639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65551636591 and 65551636600.

It is not a weakly prime, because it can be changed into another prime (65551636343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32775818321 + 32775818322.

It is an arithmetic number, because the mean of its divisors is an integer number (32775818322).

Almost surely, 2^65551636643 is an apocalyptic number.

65551636643 is a deficient number, since it is larger than the sum of its proper divisors (1).

65551636643 is an equidigital number, since it uses as much as digits as its factorization.

65551636643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 50.

The spelling of 65551636643 in words is "sixty-five billion, five hundred fifty-one million, six hundred thirty-six thousand, six hundred forty-three".