28354699777 has 2 divisors, whose sum is σ = 28354699778. Its totient is φ = 28354699776.

The previous prime is 28354699753. The next prime is 28354699873. The reversal of 28354699777 is 77799645382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16187727361 + 12166972416 = 127231^2 + 110304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28354699777 is a prime.

It is not a weakly prime, because it can be changed into another prime (28354699717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14177349888 + 14177349889.

It is an arithmetic number, because the mean of its divisors is an integer number (14177349889).

Almost surely, 2^28354699777 is an apocalyptic number.

It is an amenable number.

28354699777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28354699777 is an equidigital number, since it uses as much as digits as its factorization.

28354699777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160030080, while the sum is 67.

The spelling of 28354699777 in words is "twenty-eight billion, three hundred fifty-four million, six hundred ninety-nine thousand, seven hundred seventy-seven".