65544524561 has 16 divisors (see below), whose sum is σ = 70243891200. Its totient is φ = 60979092048.

The previous prime is 65544524503. The next prime is 65544524611. The reversal of 65544524561 is 16542544556.

It is not a de Polignac number, because 65544524561 - 2¹⁰ = 65544523537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65544524761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138920 + ... + 387798.

It is an arithmetic number, because the mean of its divisors is an integer number (4390243200).

Almost surely, 2^65544524561 is an apocalyptic number.

It is an amenable number.

65544524561 is a deficient number, since it is larger than the sum of its proper divisors (4699366639).

65544524561 is a wasteful number, since it uses less digits than its factorization.

65544524561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249148.

The product of its digits is 2880000, while the sum is 47.

The spelling of 65544524561 in words is "sixty-five billion, five hundred forty-four million, five hundred twenty-four thousand, five hundred sixty-one".