51128521753 has 2 divisors, whose sum is σ = 51128521754. Its totient is φ = 51128521752.

The previous prime is 51128521747. The next prime is 51128521781. The reversal of 51128521753 is 35712582115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31075696089 + 20052825664 = 176283^2 + 141608^2 .

It is a cyclic number.

It is not a de Polignac number, because 51128521753 - 2¹³ = 51128513561 is a prime.

It is a super-2 number, since 2×51128521753² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51128521153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25564260876 + 25564260877.

It is an arithmetic number, because the mean of its divisors is an integer number (25564260877).

Almost surely, 2^51128521753 is an apocalyptic number.

It is an amenable number.

51128521753 is a deficient number, since it is larger than the sum of its proper divisors (1).

51128521753 is an equidigital number, since it uses as much as digits as its factorization.

51128521753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 40.

The spelling of 51128521753 in words is "fifty-one billion, one hundred twenty-eight million, five hundred twenty-one thousand, seven hundred fifty-three".