19777852741 has 2 divisors, whose sum is σ = 19777852742. Its totient is φ = 19777852740.

The previous prime is 19777852727. The next prime is 19777852747. The reversal of 19777852741 is 14725877791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10319512225 + 9458340516 = 101585^2 + 97254^2 .

It is a cyclic number.

It is not a de Polignac number, because 19777852741 - 2⁷ = 19777852613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19777852747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9888926370 + 9888926371.

It is an arithmetic number, because the mean of its divisors is an integer number (9888926371).

Almost surely, 2^19777852741 is an apocalyptic number.

It is an amenable number.

19777852741 is a deficient number, since it is larger than the sum of its proper divisors (1).

19777852741 is an equidigital number, since it uses as much as digits as its factorization.

19777852741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6914880, while the sum is 58.

The spelling of 19777852741 in words is "nineteen billion, seven hundred seventy-seven million, eight hundred fifty-two thousand, seven hundred forty-one".