28317751619 has 2 divisors, whose sum is σ = 28317751620. Its totient is φ = 28317751618.

The previous prime is 28317751589. The next prime is 28317751661. The reversal of 28317751619 is 91615771382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28317751619 is a prime.

It is a super-2 number, since 2×28317751619² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28317751019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158875809 + 14158875810.

It is an arithmetic number, because the mean of its divisors is an integer number (14158875810).

Almost surely, 2^28317751619 is an apocalyptic number.

28317751619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317751619 is an equidigital number, since it uses as much as digits as its factorization.

28317751619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The spelling of 28317751619 in words is "twenty-eight billion, three hundred seventeen million, seven hundred fifty-one thousand, six hundred nineteen".