65645014623 has 4 divisors (see below), whose sum is σ = 87526686168. Its totient is φ = 43763343080.

The previous prime is 65645014619. The next prime is 65645014637. The reversal of 65645014623 is 32641054656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65645014623 - 2² = 65645014619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65645012623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10940835768 + ... + 10940835773.

It is an arithmetic number, because the mean of its divisors is an integer number (21881671542).

Almost surely, 2^65645014623 is an apocalyptic number.

65645014623 is a deficient number, since it is larger than the sum of its proper divisors (21881671545).

65645014623 is a wasteful number, since it uses less digits than its factorization.

65645014623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21881671544.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 65645014623 in words is "sixty-five billion, six hundred forty-five million, fourteen thousand, six hundred twenty-three".