51576721741 has 2 divisors, whose sum is σ = 51576721742. Its totient is φ = 51576721740.

The previous prime is 51576721717. The next prime is 51576721811. The reversal of 51576721741 is 14712767515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51459107716 + 117614025 = 226846^2 + 10845^2 .

It is a cyclic number.

It is not a de Polignac number, because 51576721741 - 2⁵ = 51576721709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51576721691 and 51576721700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51576722741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25788360870 + 25788360871.

It is an arithmetic number, because the mean of its divisors is an integer number (25788360871).

Almost surely, 2^51576721741 is an apocalyptic number.

It is an amenable number.

51576721741 is a deficient number, since it is larger than the sum of its proper divisors (1).

51576721741 is an equidigital number, since it uses as much as digits as its factorization.

51576721741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411600, while the sum is 46.

The spelling of 51576721741 in words is "fifty-one billion, five hundred seventy-six million, seven hundred twenty-one thousand, seven hundred forty-one".