65136311479849 has 3 divisors (see below), whose sum is σ = 65136319550557. Its totient is φ = 65136303409142.

The previous prime is 65136311479807. The next prime is 65136311479907. The reversal of 65136311479849 is 94897411363156.

The square root of 65136311479849 is 8070707.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-65136311479849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65136311419849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4035354 + ... + 12106060.

Almost surely, 2^{65136311479849} is an apocalyptic number.

65136311479849 is the 8070707-th square number.

65136311479849 is the 4035354-th centered octagonal number.

It is an amenable number.

65136311479849 is a deficient number, since it is larger than the sum of its proper divisors (8070708).

65136311479849 is an frugal number, since it uses more digits than its factorization.

65136311479849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16141414 (or 8070707 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 67.

The spelling of 65136311479849 in words is "sixty-five trillion, one hundred thirty-six billion, three hundred eleven million, four hundred seventy-nine thousand, eight hundred forty-nine".