51559498311 has 16 divisors (see below), whose sum is σ = 69261868800. Its totient is φ = 34115165888.

The previous prime is 51559498303. The next prime is 51559498349. The reversal of 51559498311 is 11389495515.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51559498311 - 2³ = 51559498303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51559498351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2727430 + ... + 2746268.

It is an arithmetic number, because the mean of its divisors is an integer number (4328866800).

Almost surely, 2^51559498311 is an apocalyptic number.

51559498311 is a deficient number, since it is larger than the sum of its proper divisors (17702370489).

51559498311 is a wasteful number, since it uses less digits than its factorization.

51559498311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25638.

The product of its digits is 972000, while the sum is 51.

The spelling of 51559498311 in words is "fifty-one billion, five hundred fifty-nine million, four hundred ninety-eight thousand, three hundred eleven".