65018909340 has 576 divisors, whose sum is σ = 265866531840. Its totient is φ = 12451553280.

The previous prime is 65018909279. The next prime is 65018909387. The reversal of 65018909340 is 4390981056.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 9740244 + ... + 9746916.

It is an arithmetic number, because the mean of its divisors is an integer number (461573840).

Almost surely, 2^65018909340 is an apocalyptic number.

65018909340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65018909340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132933265920).

65018909340 is an abundant number, since it is smaller than the sum of its proper divisors (200847622500).

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

65018909340 is a wasteful number, since it uses less digits than its factorization.

65018909340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762 (or 6757 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 65018909340 in words is "sixty-five billion, eighteen million, nine hundred nine thousand, three hundred forty".