65511010557 has 12 divisors (see below), whose sum is σ = 94636781980. Its totient is φ = 43669499328.

The previous prime is 65511010529. The next prime is 65511010577. The reversal of 65511010557 is 75501011556.

It is a happy number.

65511010557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32423764356 + 33087246201 = 180066^2 + 181899^2 .

It is not a de Polignac number, because 65511010557 - 2²³ = 65502621949 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 (65511010577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282382 + ... + 459087.

Almost surely, 2^65511010557 is an apocalyptic number.

It is an amenable number.

65511010557 is a deficient number, since it is larger than the sum of its proper divisors (29125771423).

65511010557 is a wasteful number, since it uses less digits than its factorization.

65511010557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751292 (or 751289 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

Subtracting 65511010557 from its reverse (75501011556), we obtain a palindrome (9990000999).

The spelling of 65511010557 in words is "sixty-five billion, five hundred eleven million, ten thousand, five hundred fifty-seven".