51565153413 has 4 divisors (see below), whose sum is σ = 68753537888. Its totient is φ = 34376768940.

The previous prime is 51565153399. The next prime is 51565153421. The reversal of 51565153413 is 31435156515.

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 not a de Polignac number, because 51565153413 - 2⁶ = 51565153349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51565158413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8594192233 + ... + 8594192238.

It is an arithmetic number, because the mean of its divisors is an integer number (17188384472).

Almost surely, 2^51565153413 is an apocalyptic number.

It is an amenable number.

51565153413 is a deficient number, since it is larger than the sum of its proper divisors (17188384475).

51565153413 is a wasteful number, since it uses less digits than its factorization.

51565153413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17188384474.

The product of its digits is 135000, while the sum is 39.

The spelling of 51565153413 in words is "fifty-one billion, five hundred sixty-five million, one hundred fifty-three thousand, four hundred thirteen".