77772108941 has 2 divisors, whose sum is σ = 77772108942. Its totient is φ = 77772108940.

The previous prime is 77772108919. The next prime is 77772109003. The reversal of 77772108941 is 14980127777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77442541225 + 329567716 = 278285^2 + 18154^2 .

It is a cyclic number.

It is not a de Polignac number, because 77772108941 - 2¹⁸ = 77771846797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77772108341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38886054470 + 38886054471.

It is an arithmetic number, because the mean of its divisors is an integer number (38886054471).

Almost surely, 2^77772108941 is an apocalyptic number.

It is an amenable number.

77772108941 is a deficient number, since it is larger than the sum of its proper divisors (1).

77772108941 is an equidigital number, since it uses as much as digits as its factorization.

77772108941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382976, while the sum is 53.

The spelling of 77772108941 in words is "seventy-seven billion, seven hundred seventy-two million, one hundred eight thousand, nine hundred forty-one".