65350578438 has 64 divisors (see below), whose sum is σ = 152694244800. Its totient is φ = 20687546880.

The previous prime is 65350578421. The next prime is 65350578463. The reversal of 65350578438 is 83487505356.

65350578438 is a `hidden beast` number, since 6 + 5 + 35 + 0 + 578 + 4 + 38 = 666.

65350578438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246531 + ... + 437582.

It is an arithmetic number, because the mean of its divisors is an integer number (2385847575).

Almost surely, 2^65350578438 is an apocalyptic number.

65350578438 is an abundant number, since it is smaller than the sum of its proper divisors (87343666362).

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

65350578438 is a wasteful number, since it uses less digits than its factorization.

65350578438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684214 (or 684208 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 65350578438 in words is "sixty-five billion, three hundred fifty million, five hundred seventy-eight thousand, four hundred thirty-eight".