65813842138 has 8 divisors (see below), whose sum is σ = 107695378080. Its totient is φ = 29915382780.

The previous prime is 65813842079. The next prime is 65813842139. The reversal of 65813842138 is 83124831856.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×65813842138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65813842091 and 65813842100.

It is not an unprimeable number, because it can be changed into a prime (65813842139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495769118 + ... + 1495769161.

It is an arithmetic number, because the mean of its divisors is an integer number (13461922260).

Almost surely, 2^65813842138 is an apocalyptic number.

65813842138 is a deficient number, since it is larger than the sum of its proper divisors (41881535942).

65813842138 is a wasteful number, since it uses less digits than its factorization.

65813842138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991538292.

The product of its digits is 1105920, while the sum is 49.

The spelling of 65813842138 in words is "sixty-five billion, eight hundred thirteen million, eight hundred forty-two thousand, one hundred thirty-eight".