65138196807 has 24 divisors (see below), whose sum is σ = 96121908480. Its totient is φ = 42487578000.

The previous prime is 65138196797. The next prime is 65138196811. The reversal of 65138196807 is 70869183156.

It is not a de Polignac number, because 65138196807 - 2¹⁸ = 65137934663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65138196007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1354932 + ... + 1402182.

It is an arithmetic number, because the mean of its divisors is an integer number (4005079520).

Almost surely, 2^65138196807 is an apocalyptic number.

65138196807 is a deficient number, since it is larger than the sum of its proper divisors (30983711673).

65138196807 is a wasteful number, since it uses less digits than its factorization.

65138196807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50563 (or 50560 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 65138196807 in words is "sixty-five billion, one hundred thirty-eight million, one hundred ninety-six thousand, eight hundred seven".