65455943616 has 1344 divisors, whose sum is σ = 258519168000. Its totient is φ = 16094453760.

The previous prime is 65455943569. The next prime is 65455943617. The reversal of 65455943616 is 61634955456.

65455943616 is a `hidden beast` number, since 6 + 5 + 4 + 5 + 594 + 36 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (11664000) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65455943617) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1073048226 + ... + 1073048286.

Almost surely, 2^65455943616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65455943616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129259584000).

65455943616 is an abundant number, since it is smaller than the sum of its proper divisors (193063224384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65455943616 is a wasteful number, since it uses less digits than its factorization.

65455943616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 144 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 65455943616 in words is "sixty-five billion, four hundred fifty-five million, nine hundred forty-three thousand, six hundred sixteen".