65650053504 has 128 divisors (see below), whose sum is σ = 199648500480. Its totient is φ = 18723870720.

The previous prime is 65650053493. The next prime is 65650053523. The reversal of 65650053504 is 40535005656.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1513462 + ... + 1556234.

It is an arithmetic number, because the mean of its divisors is an integer number (1559753910).

Almost surely, 2^65650053504 is an apocalyptic number.

65650053504 is a gapful number since it is divisible by the number (64) 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 65650053504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99824250240).

65650053504 is an abundant number, since it is smaller than the sum of its proper divisors (133998446976).

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

65650053504 is a wasteful number, since it uses less digits than its factorization.

65650053504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43368 (or 43356 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 39.

The spelling of 65650053504 in words is "sixty-five billion, six hundred fifty million, fifty-three thousand, five hundred four".