51712065501 has 4 divisors (see below), whose sum is σ = 68949420672. Its totient is φ = 34474710332.

The previous prime is 51712065487. The next prime is 51712065523. The reversal of 51712065501 is 10556021715.

It is a happy number.

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 51712065501 - 2⁶ = 51712065437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51712060501) 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, 8618677581 + ... + 8618677586.

It is an arithmetic number, because the mean of its divisors is an integer number (17237355168).

Almost surely, 2^51712065501 is an apocalyptic number.

It is an amenable number.

51712065501 is a deficient number, since it is larger than the sum of its proper divisors (17237355171).

51712065501 is a wasteful number, since it uses less digits than its factorization.

51712065501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17237355170.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 51712065501 in words is "fifty-one billion, seven hundred twelve million, sixty-five thousand, five hundred one".