28927011601 has 2 divisors, whose sum is σ = 28927011602. Its totient is φ = 28927011600.

The previous prime is 28927011599. The next prime is 28927011637. The reversal of 28927011601 is 10611072982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23886011601 + 5041000000 = 154551^2 + 71000^2 .

It is a cyclic number.

It is not a de Polignac number, because 28927011601 - 2¹ = 28927011599 is a prime.

Together with 28927011599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28927011671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14463505800 + 14463505801.

It is an arithmetic number, because the mean of its divisors is an integer number (14463505801).

Almost surely, 2^28927011601 is an apocalyptic number.

It is an amenable number.

28927011601 is a deficient number, since it is larger than the sum of its proper divisors (1).

28927011601 is an equidigital number, since it uses as much as digits as its factorization.

28927011601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 28927011601 in words is "twenty-eight billion, nine hundred twenty-seven million, eleven thousand, six hundred one".