51128265148337 has 4 divisors (see below), whose sum is σ = 55061208621300. Its totient is φ = 47195321675376.

The previous prime is 51128265148319. The next prime is 51128265148453. The reversal of 51128265148337 is 73384156282115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16981726150321 + 34146538998016 = 4120889^2 + 5843504^2 .

It is a cyclic number.

It is not a de Polignac number, because 51128265148337 - 2¹⁴ = 51128265131953 is a prime.

It is a super-2 number, since 2×51128265148337² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51128265138337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1966471736462 + ... + 1966471736487.

It is an arithmetic number, because the mean of its divisors is an integer number (13765302155325).

Almost surely, 2^{51128265148337} is an apocalyptic number.

It is an amenable number.

51128265148337 is a deficient number, since it is larger than the sum of its proper divisors (3932943472963).

51128265148337 is a wasteful number, since it uses less digits than its factorization.

51128265148337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932943472962.

The product of its digits is 9676800, while the sum is 56.

The spelling of 51128265148337 in words is "fifty-one trillion, one hundred twenty-eight billion, two hundred sixty-five million, one hundred forty-eight thousand, three hundred thirty-seven".