65019967488 has 720 divisors, whose sum is σ = 238372734600. Its totient is φ = 17557585920.

The previous prime is 65019967483. The next prime is 65019967489. The reversal of 65019967488 is 88476991056.

65019967488 is a `hidden beast` number, since 6 + 5 + 0 + 1 + 99 + 67 + 488 = 666.

65019967488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65019967483) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 154441518 + ... + 154441938.

Almost surely, 2^65019967488 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 65019967488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119186367300).

65019967488 is an abundant number, since it is smaller than the sum of its proper divisors (173352767112).

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

65019967488 is a wasteful number, since it uses less digits than its factorization.

65019967488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 65019967488 in words is "sixty-five billion, nineteen million, nine hundred sixty-seven thousand, four hundred eighty-eight".