28061775545 has 32 divisors (see below), whose sum is σ = 35647180800. Its totient is φ = 21147811776.

The previous prime is 28061775529. The next prime is 28061775551. The reversal of 28061775545 is 54557716082.

It is a cyclic number.

It is not a de Polignac number, because 28061775545 - 2⁴ = 28061775529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28061775493 and 28061775502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15952376 + ... + 15954134.

It is an arithmetic number, because the mean of its divisors is an integer number (1113974400).

Almost surely, 2^28061775545 is an apocalyptic number.

It is an amenable number.

28061775545 is a deficient number, since it is larger than the sum of its proper divisors (7585405255).

28061775545 is a wasteful number, since it uses less digits than its factorization.

28061775545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 28061775545 in words is "twenty-eight billion, sixty-one million, seven hundred seventy-five thousand, five hundred forty-five".