65381867749000 has 256 divisors, whose sum is σ = 168334224364800. Its totient is φ = 23572007424000.

The previous prime is 65381867748949. The next prime is 65381867749001. The reversal of 65381867749000 is 94776818356.

It is not an unprimeable number, because it can be changed into a prime (65381867749001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 663503734 + ... + 663602266.

It is an arithmetic number, because the mean of its divisors is an integer number (657555563925).

Almost surely, 2^{65381867749000} 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 65381867749000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84167112182400).

65381867749000 is an abundant number, since it is smaller than the sum of its proper divisors (102952356615800).

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

65381867749000 is a wasteful number, since it uses less digits than its factorization.

65381867749000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99081 (or 99067 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 65381867749000 in words is "sixty-five trillion, three hundred eighty-one billion, eight hundred sixty-seven million, seven hundred forty-nine thousand".