50778115573 has 2 divisors, whose sum is σ = 50778115574. Its totient is φ = 50778115572.

The previous prime is 50778115567. The next prime is 50778115607. The reversal of 50778115573 is 37551187705.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39990800529 + 10787315044 = 199977^2 + 103862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50778115573 is a prime.

It is a super-2 number, since 2×50778115573² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50778115273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25389057786 + 25389057787.

It is an arithmetic number, because the mean of its divisors is an integer number (25389057787).

Almost surely, 2^50778115573 is an apocalyptic number.

It is an amenable number.

50778115573 is a deficient number, since it is larger than the sum of its proper divisors (1).

50778115573 is an equidigital number, since it uses as much as digits as its factorization.

50778115573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1029000, while the sum is 49.

The spelling of 50778115573 in words is "fifty billion, seven hundred seventy-eight million, one hundred fifteen thousand, five hundred seventy-three".