77783459059 has 4 divisors (see below), whose sum is σ = 77784129904. Its totient is φ = 77782788216.

The previous prime is 77783459051. The next prime is 77783459069. The reversal of 77783459059 is 95095438777.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95095438777 = 5197 ⋅18298141.

It is a cyclic number.

It is not a de Polignac number, because 77783459059 - 2³ = 77783459051 is a prime.

It is a deceptive number, since it divides R_77783459058.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77783459051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111807 + ... + 409960.

It is an arithmetic number, because the mean of its divisors is an integer number (19446032476).

Almost surely, 2^77783459059 is an apocalyptic number.

77783459059 is the 149077-th nonagonal number.

77783459059 is a deficient number, since it is larger than the sum of its proper divisors (670845).

77783459059 is a wasteful number, since it uses less digits than its factorization.

77783459059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670844.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 77783459059 in words is "seventy-seven billion, seven hundred eighty-three million, four hundred fifty-nine thousand, fifty-nine".