742778895049687 has 2 divisors, whose sum is σ = 742778895049688. Its totient is φ = 742778895049686.

The previous prime is 742778895049651. The next prime is 742778895049771. The reversal of 742778895049687 is 786940598877247.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742778895049687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742778895049627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371389447524843 + 371389447524844.

It is an arithmetic number, because the mean of its divisors is an integer number (371389447524844).

Almost surely, 2^{742778895049687} is an apocalyptic number.

742778895049687 is a deficient number, since it is larger than the sum of its proper divisors (1).

742778895049687 is an equidigital number, since it uses as much as digits as its factorization.

742778895049687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95591301120, while the sum is 91.

The spelling of 742778895049687 in words is "seven hundred forty-two trillion, seven hundred seventy-eight billion, eight hundred ninety-five million, forty-nine thousand, six hundred eighty-seven".