28387801501 has 2 divisors, whose sum is σ = 28387801502. Its totient is φ = 28387801500.

The previous prime is 28387801499. The next prime is 28387801511. The reversal of 28387801501 is 10510878382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27527787225 + 860014276 = 165915^2 + 29326^2 .

It is a cyclic number.

It is not a de Polignac number, because 28387801501 - 2¹ = 28387801499 is a prime.

Together with 28387801499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28387801511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14193900750 + 14193900751.

It is an arithmetic number, because the mean of its divisors is an integer number (14193900751).

Almost surely, 2^28387801501 is an apocalyptic number.

It is an amenable number.

28387801501 is a deficient number, since it is larger than the sum of its proper divisors (1).

28387801501 is an equidigital number, since it uses as much as digits as its factorization.

28387801501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 28387801501 in words is "twenty-eight billion, three hundred eighty-seven million, eight hundred one thousand, five hundred one".