53321756377 has 2 divisors, whose sum is σ = 53321756378. Its totient is φ = 53321756376.

The previous prime is 53321756357. The next prime is 53321756393. The reversal of 53321756377 is 77365712335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38326284441 + 14995471936 = 195771^2 + 122456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53321756377 is a prime.

It is a super-2 number, since 2×53321756377² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53321756377.

It is not a weakly prime, because it can be changed into another prime (53321756357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26660878188 + 26660878189.

It is an arithmetic number, because the mean of its divisors is an integer number (26660878189).

Almost surely, 2^53321756377 is an apocalyptic number.

It is an amenable number.

53321756377 is a deficient number, since it is larger than the sum of its proper divisors (1).

53321756377 is an equidigital number, since it uses as much as digits as its factorization.

53321756377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2778300, while the sum is 49.

The spelling of 53321756377 in words is "fifty-three billion, three hundred twenty-one million, seven hundred fifty-six thousand, three hundred seventy-seven".