28061277855 has 128 divisors (see below), whose sum is σ = 51377614848. Its totient is φ = 12983887872.

The previous prime is 28061277809. The next prime is 28061277863. The reversal of 28061277855 is 55877216082.

It is not a de Polignac number, because 28061277855 - 2⁶ = 28061277791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28061277798 and 28061277807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28145217 + ... + 28146213.

It is an arithmetic number, because the mean of its divisors is an integer number (401387616).

Almost surely, 2^28061277855 is an apocalyptic number.

28061277855 is a deficient number, since it is larger than the sum of its proper divisors (23316336993).

28061277855 is a wasteful number, since it uses less digits than its factorization.

28061277855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 28061277855 in words is "twenty-eight billion, sixty-one million, two hundred seventy-seven thousand, eight hundred fifty-five".