28601573156873 has 2 divisors, whose sum is σ = 28601573156874. Its totient is φ = 28601573156872.

The previous prime is 28601573156857. The next prime is 28601573156941. The reversal of 28601573156873 is 37865137510682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26636044864144 + 1965528292729 = 5161012^2 + 1401973^2 .

It is a cyclic number.

It is not a de Polignac number, because 28601573156873 - 2⁴ = 28601573156857 is a prime.

It is not a weakly prime, because it can be changed into another prime (28601573156473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14300786578436 + 14300786578437.

It is an arithmetic number, because the mean of its divisors is an integer number (14300786578437).

Almost surely, 2^{28601573156873} is an apocalyptic number.

It is an amenable number.

28601573156873 is a deficient number, since it is larger than the sum of its proper divisors (1).

28601573156873 is an equidigital number, since it uses as much as digits as its factorization.

28601573156873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 28601573156873 in words is "twenty-eight trillion, six hundred one billion, five hundred seventy-three million, one hundred fifty-six thousand, eight hundred seventy-three".