65444052077 has 4 divisors (see below), whose sum is σ = 65446318656. Its totient is φ = 65441785500.

The previous prime is 65444052073. The next prime is 65444052109. The reversal of 65444052077 is 77025044456.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65444052077 - 2² = 65444052073 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 (65444052073) 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, 1089413 + ... + 1147914.

It is an arithmetic number, because the mean of its divisors is an integer number (16361579664).

Almost surely, 2^65444052077 is an apocalyptic number.

It is an amenable number.

65444052077 is a deficient number, since it is larger than the sum of its proper divisors (2266579).

65444052077 is a wasteful number, since it uses less digits than its factorization.

65444052077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266578.

The product of its (nonzero) digits is 940800, while the sum is 44.

The spelling of 65444052077 in words is "sixty-five billion, four hundred forty-four million, fifty-two thousand, seventy-seven".