65532623557 has 16 divisors (see below), whose sum is σ = 66992592240. Its totient is φ = 64090048000.

The previous prime is 65532623551. The next prime is 65532623573. The reversal of 65532623557 is 75532623556.

It can be written as a sum of positive squares in 8 ways, for example, as 44742721 + 65487880836 = 6689^2 + 255906^2 .

It is a cyclic number.

It is not a de Polignac number, because 65532623557 - 2³ = 65532623549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65532623557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65532623551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10612923 + ... + 10619095.

It is an arithmetic number, because the mean of its divisors is an integer number (4187037015).

Almost surely, 2^65532623557 is an apocalyptic number.

It is an amenable number.

65532623557 is a deficient number, since it is larger than the sum of its proper divisors (1459968683).

65532623557 is a wasteful number, since it uses less digits than its factorization.

65532623557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7544.

The product of its digits is 5670000, while the sum is 49.

Subtracting 65532623557 from its reverse (75532623556), we obtain a palindrome (9999999999).

The spelling of 65532623557 in words is "sixty-five billion, five hundred thirty-two million, six hundred twenty-three thousand, five hundred fifty-seven".