51115526705 has 4 divisors (see below), whose sum is σ = 61338632052. Its totient is φ = 40892421360.

The previous prime is 51115526699. The next prime is 51115526741. The reversal of 51115526705 is 50762551115.

It is a happy number.

51115526705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50762551115 = 5 ⋅10152510223.

It can be written as a sum of positive squares in 2 ways, for example, as 14652860401 + 36462666304 = 121049^2 + 190952^2 .

It is not a de Polignac number, because 51115526705 - 2⁶ = 51115526641 is a prime.

It is a super-2 number, since 2×51115526705² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111552666 + ... + 5111552675.

It is an arithmetic number, because the mean of its divisors is an integer number (15334658013).

Almost surely, 2^51115526705 is an apocalyptic number.

It is an amenable number.

51115526705 is a deficient number, since it is larger than the sum of its proper divisors (10223105347).

51115526705 is a wasteful number, since it uses less digits than its factorization.

51115526705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10223105346.

The product of its (nonzero) digits is 52500, while the sum is 38.

The spelling of 51115526705 in words is "fifty-one billion, one hundred fifteen million, five hundred twenty-six thousand, seven hundred five".