51894511777 has 2 divisors, whose sum is σ = 51894511778. Its totient is φ = 51894511776.

The previous prime is 51894511703. The next prime is 51894511789. The reversal of 51894511777 is 77711549815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48129339456 + 3765172321 = 219384^2 + 61361^2 .

It is a cyclic number.

It is not a de Polignac number, because 51894511777 - 2¹⁹ = 51893987489 is a prime.

It is not a weakly prime, because it can be changed into another prime (51894512777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25947255888 + 25947255889.

It is an arithmetic number, because the mean of its divisors is an integer number (25947255889).

Almost surely, 2^51894511777 is an apocalyptic number.

It is an amenable number.

51894511777 is a deficient number, since it is larger than the sum of its proper divisors (1).

51894511777 is an equidigital number, since it uses as much as digits as its factorization.

51894511777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2469600, while the sum is 55.

The spelling of 51894511777 in words is "fifty-one billion, eight hundred ninety-four million, five hundred eleven thousand, seven hundred seventy-seven".