28581291967 has 2 divisors, whose sum is σ = 28581291968. Its totient is φ = 28581291966.

The previous prime is 28581291919. The next prime is 28581291971. The reversal of 28581291967 is 76919218582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28581291967 - 2¹⁵ = 28581259199 is a prime.

It is a super-3 number, since 3×28581291967³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28581291917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14290645983 + 14290645984.

It is an arithmetic number, because the mean of its divisors is an integer number (14290645984).

Almost surely, 2^28581291967 is an apocalyptic number.

28581291967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28581291967 is an equidigital number, since it uses as much as digits as its factorization.

28581291967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 58.

The spelling of 28581291967 in words is "twenty-eight billion, five hundred eighty-one million, two hundred ninety-one thousand, nine hundred sixty-seven".