28451555087 has 4 divisors (see below), whose sum is σ = 28455122640. Its totient is φ = 28447987536.

The previous prime is 28451555057. The next prime is 28451555107. The reversal of 28451555087 is 78055515482.

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 28451555087 - 2²⁴ = 28434777871 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 (28451555057) 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, 1771787 + ... + 1787772.

It is an arithmetic number, because the mean of its divisors is an integer number (7113780660).

Almost surely, 2^28451555087 is an apocalyptic number.

28451555087 is a deficient number, since it is larger than the sum of its proper divisors (3567553).

28451555087 is an equidigital number, since it uses as much as digits as its factorization.

28451555087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567552.

The product of its (nonzero) digits is 2240000, while the sum is 50.

The spelling of 28451555087 in words is "twenty-eight billion, four hundred fifty-one million, five hundred fifty-five thousand, eighty-seven".