65493997707438 has 32 divisors (see below), whose sum is σ = 147042652367520. Its totient is φ = 21606267283200.

The previous prime is 65493997707419. The next prime is 65493997707487. The reversal of 65493997707438 is 83470779939456.

It is a happy number.

65493997707438 is a `hidden beast` number, since 6 + 5 + 4 + 93 + 9 + 97 + 7 + 0 + 7 + 438 = 666.

65493997707438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6251808213 + ... + 6251818688.

It is an arithmetic number, because the mean of its divisors is an integer number (4595082886485).

Almost surely, 2^{65493997707438} is an apocalyptic number.

65493997707438 is an abundant number, since it is smaller than the sum of its proper divisors (81548654660082).

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

65493997707438 is a wasteful number, since it uses less digits than its factorization.

65493997707438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12503627009 (or 12503627003 counting only the distinct ones).

The product of its (nonzero) digits is 8641624320, while the sum is 81.

The spelling of 65493997707438 in words is "sixty-five trillion, four hundred ninety-three billion, nine hundred ninety-seven million, seven hundred seven thousand, four hundred thirty-eight".