65938180137 has 4 divisors (see below), whose sum is σ = 87917573520. Its totient is φ = 43958786756.

The previous prime is 65938180129. The next prime is 65938180151. The reversal of 65938180137 is 73108183956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65938180137 - 2³ = 65938180129 is a prime.

It is a super-2 number, since 2×65938180137² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65938180137.

It is not an unprimeable number, because it can be changed into a prime (65938180337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10989696687 + ... + 10989696692.

It is an arithmetic number, because the mean of its divisors is an integer number (21979393380).

Almost surely, 2^65938180137 is an apocalyptic number.

It is an amenable number.

65938180137 is a deficient number, since it is larger than the sum of its proper divisors (21979393383).

65938180137 is a wasteful number, since it uses less digits than its factorization.

65938180137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21979393382.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 65938180137 in words is "sixty-five billion, nine hundred thirty-eight million, one hundred eighty thousand, one hundred thirty-seven".