28785061311 has 16 divisors (see below), whose sum is σ = 39839259648. Its totient is φ = 18473839200.

The previous prime is 28785061303. The next prime is 28785061321. The reversal of 28785061311 is 11316058782.

It is not a de Polignac number, because 28785061311 - 2³ = 28785061303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785061301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1664755 + ... + 1681956.

It is an arithmetic number, because the mean of its divisors is an integer number (2489953728).

Almost surely, 2^28785061311 is an apocalyptic number.

28785061311 is a deficient number, since it is larger than the sum of its proper divisors (11054198337).

28785061311 is a wasteful number, since it uses less digits than its factorization.

28785061311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346822.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 28785061311 in words is "twenty-eight billion, seven hundred eighty-five million, sixty-one thousand, three hundred eleven".