51128606527 has 4 divisors (see below), whose sum is σ = 51634830456. Its totient is φ = 50622382600.

The previous prime is 51128606519. The next prime is 51128606537. The reversal of 51128606527 is 72560682115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51128606527 - 2³ = 51128606519 is a prime.

It is a super-2 number, since 2×51128606527² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51128606537) 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, 253111813 + ... + 253112014.

It is an arithmetic number, because the mean of its divisors is an integer number (12908707614).

Almost surely, 2^51128606527 is an apocalyptic number.

51128606527 is a deficient number, since it is larger than the sum of its proper divisors (506223929).

51128606527 is a wasteful number, since it uses less digits than its factorization.

51128606527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506223928.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 51128606527 in words is "fifty-one billion, one hundred twenty-eight million, six hundred six thousand, five hundred twenty-seven".