51027770220649 has 2 divisors, whose sum is σ = 51027770220650. Its totient is φ = 51027770220648.

The previous prime is 51027770220611. The next prime is 51027770220677. The reversal of 51027770220649 is 94602207772015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44785607762025 + 6242162458624 = 6692205^2 + 2498432^2 .

It is a cyclic number.

It is not a de Polignac number, because 51027770220649 - 2²⁹ = 51027233349737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51027770220596 and 51027770220605.

It is not a weakly prime, because it can be changed into another prime (51027770230649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513885110324 + 25513885110325.

It is an arithmetic number, because the mean of its divisors is an integer number (25513885110325).

Almost surely, 2^{51027770220649} is an apocalyptic number.

It is an amenable number.

51027770220649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51027770220649 is an equidigital number, since it uses as much as digits as its factorization.

51027770220649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 51027770220649 in words is "fifty-one trillion, twenty-seven billion, seven hundred seventy million, two hundred twenty thousand, six hundred forty-nine".