28605633401 has 2 divisors, whose sum is σ = 28605633402. Its totient is φ = 28605633400.

The previous prime is 28605633319. The next prime is 28605633443. The reversal of 28605633401 is 10433650682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28602927376 + 2706025 = 169124^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 28605633401 - 2³⁰ = 27531891577 is a prime.

It is not a weakly prime, because it can be changed into another prime (28605633601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14302816700 + 14302816701.

It is an arithmetic number, because the mean of its divisors is an integer number (14302816701).

Almost surely, 2^28605633401 is an apocalyptic number.

It is an amenable number.

28605633401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28605633401 is an equidigital number, since it uses as much as digits as its factorization.

28605633401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 28605633401 in words is "twenty-eight billion, six hundred five million, six hundred thirty-three thousand, four hundred one".