50778205401569 has 2 divisors, whose sum is σ = 50778205401570. Its totient is φ = 50778205401568.

The previous prime is 50778205401509. The next prime is 50778205401577. The reversal of 50778205401569 is 96510450287705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42355951341025 + 8422254060544 = 6508145^2 + 2902112^2 .

It is a cyclic number.

It is not a de Polignac number, because 50778205401569 - 2¹² = 50778205397473 is a prime.

It is a super-2 number, since 2×50778205401569² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50778205401509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25389102700784 + 25389102700785.

It is an arithmetic number, because the mean of its divisors is an integer number (25389102700785).

Almost surely, 2^{50778205401569} is an apocalyptic number.

It is an amenable number.

50778205401569 is a deficient number, since it is larger than the sum of its proper divisors (1).

50778205401569 is an equidigital number, since it uses as much as digits as its factorization.

50778205401569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168000, while the sum is 59.

The spelling of 50778205401569 in words is "fifty trillion, seven hundred seventy-eight billion, two hundred five million, four hundred one thousand, five hundred sixty-nine".