65040340560 has 160 divisors (see below), whose sum is σ = 218110706688. Its totient is φ = 15937966080.

The previous prime is 65040340559. The next prime is 65040340583. The reversal of 65040340560 is 6504304056.

It is a super-2 number, since 2×65040340560² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 649020 + ... + 742500.

Almost surely, 2^65040340560 is an apocalyptic number.

65040340560 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 65040340560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109055353344).

65040340560 is an abundant number, since it is smaller than the sum of its proper divisors (153070366128).

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

65040340560 is a wasteful number, since it uses less digits than its factorization.

65040340560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93733 (or 93727 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 65040340560 in words is "sixty-five billion, forty million, three hundred forty thousand, five hundred sixty".