51374347465081 has 2 divisors, whose sum is σ = 51374347465082. Its totient is φ = 51374347465080.

The previous prime is 51374347465013. The next prime is 51374347465097. The reversal of 51374347465081 is 18056474347315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44706487336681 + 6667860128400 = 6686291^2 + 2582220^2 .

It is a cyclic number.

It is not a de Polignac number, because 51374347465081 - 2²⁵ = 51374313910649 is a prime.

It is a super-2 number, since 2×51374347465081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51374347465381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25687173732540 + 25687173732541.

It is an arithmetic number, because the mean of its divisors is an integer number (25687173732541).

Almost surely, 2^{51374347465081} is an apocalyptic number.

It is an amenable number.

51374347465081 is a deficient number, since it is larger than the sum of its proper divisors (1).

51374347465081 is an equidigital number, since it uses as much as digits as its factorization.

51374347465081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33868800, while the sum is 58.

The spelling of 51374347465081 in words is "fifty-one trillion, three hundred seventy-four billion, three hundred forty-seven million, four hundred sixty-five thousand, eighty-one".