28056106465 has 8 divisors (see below), whose sum is σ = 33669193320. Its totient is φ = 22443641472.

The previous prime is 28056106433. The next prime is 28056106487. The reversal of 28056106465 is 56460165082.

It can be written as a sum of positive squares in 4 ways, for example, as 71166096 + 27984940369 = 8436^2 + 167287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28056106465 - 2⁵ = 28056106433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49660 + ... + 242029.

It is an arithmetic number, because the mean of its divisors is an integer number (4208649165).

Almost surely, 2^28056106465 is an apocalyptic number.

It is an amenable number.

28056106465 is a deficient number, since it is larger than the sum of its proper divisors (5613086855).

28056106465 is a wasteful number, since it uses less digits than its factorization.

28056106465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310931.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 28056106465 in words is "twenty-eight billion, fifty-six million, one hundred six thousand, four hundred sixty-five".