65131136621265 has 64 divisors (see below), whose sum is σ = 122596723372032. Its totient is φ = 29109503174400.

The previous prime is 65131136621219. The next prime is 65131136621293. The reversal of 65131136621265 is 56212663113156.

It is not a de Polignac number, because 65131136621265 - 2¹¹ = 65131136619217 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19323781 + ... + 22442610.

It is an arithmetic number, because the mean of its divisors is an integer number (1915573802688).

Almost surely, 2^{65131136621265} is an apocalyptic number.

65131136621265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65131136621265 is a deficient number, since it is larger than the sum of its proper divisors (57465586750767).

65131136621265 is a wasteful number, since it uses less digits than its factorization.

65131136621265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41767150.

The product of its digits is 1166400, while the sum is 48.

The spelling of 65131136621265 in words is "sixty-five trillion, one hundred thirty-one billion, one hundred thirty-six million, six hundred twenty-one thousand, two hundred sixty-five".