51055255072649 has 2 divisors, whose sum is σ = 51055255072650. Its totient is φ = 51055255072648.

The previous prime is 51055255072637. The next prime is 51055255072693. The reversal of 51055255072649 is 94627055255015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942652800400 + 11112602272249 = 6320020^2 + 3333557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51055255072649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51055255072594 and 51055255072603.

It is not a weakly prime, because it can be changed into another prime (51055255062649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25527627536324 + 25527627536325.

It is an arithmetic number, because the mean of its divisors is an integer number (25527627536325).

Almost surely, 2^{51055255072649} is an apocalyptic number.

It is an amenable number.

51055255072649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51055255072649 is an equidigital number, since it uses as much as digits as its factorization.

51055255072649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900000, while the sum is 56.

The spelling of 51055255072649 in words is "fifty-one trillion, fifty-five billion, two hundred fifty-five million, seventy-two thousand, six hundred forty-nine".