65506616055 has 40 divisors (see below), whose sum is σ = 118524198672. Its totient is φ = 34610326272.

The previous prime is 65506616053. The next prime is 65506616059. The reversal of 65506616055 is 55061660556.

It is not a de Polignac number, because 65506616055 - 2¹ = 65506616053 is a prime.

It is a super-2 number, since 2×65506616055² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65506616055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506616053) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 712482 + ... + 799151.

Almost surely, 2^65506616055 is an apocalyptic number.

65506616055 is a deficient number, since it is larger than the sum of its proper divisors (53017582617).

65506616055 is a wasteful number, since it uses less digits than its factorization.

65506616055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511757 (or 1511748 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 65506616055 in words is "sixty-five billion, five hundred six million, six hundred sixteen thousand, fifty-five".