28105676578437 has 4 divisors (see below), whose sum is σ = 37474235437920. Its totient is φ = 18737117718956.

The previous prime is 28105676578417. The next prime is 28105676578453. The reversal of 28105676578437 is 73487567650182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28105676578437 - 2¹⁴ = 28105676562053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28105676578417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4684279429737 + ... + 4684279429742.

It is an arithmetic number, because the mean of its divisors is an integer number (9368558859480).

Almost surely, 2^{28105676578437} is an apocalyptic number.

It is an amenable number.

28105676578437 is a deficient number, since it is larger than the sum of its proper divisors (9368558859483).

28105676578437 is an equidigital number, since it uses as much as digits as its factorization.

28105676578437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9368558859482.

The product of its (nonzero) digits is 474163200, while the sum is 69.

The spelling of 28105676578437 in words is "twenty-eight trillion, one hundred five billion, six hundred seventy-six million, five hundred seventy-eight thousand, four hundred thirty-seven".