134566777789 has 2 divisors, whose sum is σ = 134566777790. Its totient is φ = 134566777788.

The previous prime is 134566777727. The next prime is 134566777799. The reversal of 134566777789 is 987777665431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110061380025 + 24505397764 = 331755^2 + 156542^2 .

It is a cyclic number.

It is not a de Polignac number, because 134566777789 - 2²¹ = 134564680637 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134566777799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67283388894 + 67283388895.

It is an arithmetic number, because the mean of its divisors is an integer number (67283388895).

Almost surely, 2^134566777789 is an apocalyptic number.

It is an amenable number.

134566777789 is a deficient number, since it is larger than the sum of its proper divisors (1).

134566777789 is an equidigital number, since it uses as much as digits as its factorization.

134566777789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373403520, while the sum is 70.

The spelling of 134566777789 in words is "one hundred thirty-four billion, five hundred sixty-six million, seven hundred seventy-seven thousand, seven hundred eighty-nine".