28158485761 has 16 divisors (see below), whose sum is σ = 32678968320. Its totient is φ = 23763393360.

The previous prime is 28158485753. The next prime is 28158485777. The reversal of 28158485761 is 16758485182.

It is not a de Polignac number, because 28158485761 - 2³ = 28158485753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28158485741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328950 + ... + 405616.

It is an arithmetic number, because the mean of its divisors is an integer number (2042435520).

Almost surely, 2^28158485761 is an apocalyptic number.

It is an amenable number.

28158485761 is a deficient number, since it is larger than the sum of its proper divisors (4520482559).

28158485761 is an equidigital number, since it uses as much as digits as its factorization.

28158485761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77484.

The product of its digits is 4300800, while the sum is 55.

The spelling of 28158485761 in words is "twenty-eight billion, one hundred fifty-eight million, four hundred eighty-five thousand, seven hundred sixty-one".