65419433838 has 48 divisors (see below), whose sum is σ = 159794041680. Its totient is φ = 19824068880.

The previous prime is 65419433831. The next prime is 65419433839. The reversal of 65419433838 is 83833491456.

65419433838 is a `hidden beast` number, since 6 + 541 + 94 + 3 + 3 + 8 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65419433831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4999545 + ... + 5012612.

It is an arithmetic number, because the mean of its divisors is an integer number (3329042535).

Almost surely, 2^65419433838 is an apocalyptic number.

65419433838 is an abundant number, since it is smaller than the sum of its proper divisors (94374607842).

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

65419433838 is a wasteful number, since it uses less digits than its factorization.

65419433838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012190 (or 10012173 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 65419433838 in words is "sixty-five billion, four hundred nineteen million, four hundred thirty-three thousand, eight hundred thirty-eight".