28781416151 has 4 divisors (see below), whose sum is σ = 28801844400. Its totient is φ = 28760987904.

The previous prime is 28781416141. The next prime is 28781416193. The reversal of 28781416151 is 15161418782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28781416151 - 2¹⁴ = 28781399767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28781416141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10212011 + ... + 10214828.

It is an arithmetic number, because the mean of its divisors is an integer number (7200461100).

Almost surely, 2^28781416151 is an apocalyptic number.

28781416151 is a deficient number, since it is larger than the sum of its proper divisors (20428249).

28781416151 is a wasteful number, since it uses less digits than its factorization.

28781416151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20428248.

The product of its digits is 107520, while the sum is 44.

The spelling of 28781416151 in words is "twenty-eight billion, seven hundred eighty-one million, four hundred sixteen thousand, one hundred fifty-one".