65673239087232 has 640 divisors, whose sum is σ = 234042827040000. Its totient is φ = 17873383587840.

The previous prime is 65673239087201. The next prime is 65673239087243. The reversal of 65673239087232 is 23278093237656.

It is a happy number.

65673239087232 is a `hidden beast` number, since 6 + 5 + 6 + 7 + 3 + 2 + 390 + 8 + 7 + 232 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 65673239087232.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 402207144 + ... + 402370392.

It is an arithmetic number, because the mean of its divisors is an integer number (365691917250).

Almost surely, 2^{65673239087232} 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 65673239087232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117021413520000).

65673239087232 is an abundant number, since it is smaller than the sum of its proper divisors (168369587952768).

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

65673239087232 is a wasteful number, since it uses less digits than its factorization.

65673239087232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163546 (or 163525 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 63.

The spelling of 65673239087232 in words is "sixty-five trillion, six hundred seventy-three billion, two hundred thirty-nine million, eighty-seven thousand, two hundred thirty-two".