28061451775 has 24 divisors (see below), whose sum is σ = 39776275584. Its totient is φ = 19237692000.

The previous prime is 28061451767. The next prime is 28061451787. The reversal of 28061451775 is 57715416082.

It is not a de Polignac number, because 28061451775 - 2³ = 28061451767 is a prime.

It is a super-3 number, since 3×28061451775³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 859500 + ... + 891550.

It is an arithmetic number, because the mean of its divisors is an integer number (1657344816).

Almost surely, 2^28061451775 is an apocalyptic number.

28061451775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28061451775 is a deficient number, since it is larger than the sum of its proper divisors (11714823809).

28061451775 is a wasteful number, since it uses less digits than its factorization.

28061451775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37071 (or 37066 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 28061451775 in words is "twenty-eight billion, sixty-one million, four hundred fifty-one thousand, seven hundred seventy-five".