28217176261 has 8 divisors (see below), whose sum is σ = 28382688000. Its totient is φ = 28052060400.

The previous prime is 28217176231. The next prime is 28217176277. The reversal of 28217176261 is 16267171282.

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 28217176261 - 2⁷ = 28217176133 is a prime.

It is a super-2 number, since 2×28217176261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28217176231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44611 + ... + 241711.

It is an arithmetic number, because the mean of its divisors is an integer number (3547836000).

Almost surely, 2^28217176261 is an apocalyptic number.

It is an amenable number.

28217176261 is a deficient number, since it is larger than the sum of its proper divisors (165511739).

28217176261 is a wasteful number, since it uses less digits than its factorization.

28217176261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197939.

The product of its digits is 112896, while the sum is 43.

The spelling of 28217176261 in words is "twenty-eight billion, two hundred seventeen million, one hundred seventy-six thousand, two hundred sixty-one".