28801860151681 has 8 divisors (see below), whose sum is σ = 28830862675944. Its totient is φ = 28772859181440.

The previous prime is 28801860151679. The next prime is 28801860151697. The reversal of 28801860151681 is 18615106810882.

It can be written as a sum of positive squares in 4 ways, for example, as 8068326630400 + 20733533521281 = 2840480^2 + 4553409^2 .

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 28801860151681 - 2¹ = 28801860151679 is a prime.

It is a super-2 number, since 2×28801860151681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28801861151681) 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, 38671101 + ... + 39408853.

It is an arithmetic number, because the mean of its divisors is an integer number (3603857834493).

Almost surely, 2^{28801860151681} is an apocalyptic number.

It is an amenable number.

28801860151681 is a deficient number, since it is larger than the sum of its proper divisors (29002524263).

28801860151681 is a wasteful number, since it uses less digits than its factorization.

28801860151681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777011.

The product of its (nonzero) digits is 1474560, while the sum is 55.

The spelling of 28801860151681 in words is "twenty-eight trillion, eight hundred one billion, eight hundred sixty million, one hundred fifty-one thousand, six hundred eighty-one".