77455633655573 has 2 divisors, whose sum is σ = 77455633655574. Its totient is φ = 77455633655572.

The previous prime is 77455633655473. The next prime is 77455633655581. The reversal of 77455633655573 is 37555633655477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39816831963364 + 37638801692209 = 6310058^2 + 6135047^2 .

It is a cyclic number.

It is not a de Polignac number, because 77455633655573 - 2⁸ = 77455633655317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77455633655497 and 77455633655506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77455633655473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38727816827786 + 38727816827787.

It is an arithmetic number, because the mean of its divisors is an integer number (38727816827787).

Almost surely, 2^{77455633655573} is an apocalyptic number.

It is an amenable number.

77455633655573 is a deficient number, since it is larger than the sum of its proper divisors (1).

77455633655573 is an equidigital number, since it uses as much as digits as its factorization.

77455633655573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4167450000, while the sum is 71.

The spelling of 77455633655573 in words is "seventy-seven trillion, four hundred fifty-five billion, six hundred thirty-three million, six hundred fifty-five thousand, five hundred seventy-three".