28619147657 has 2 divisors, whose sum is σ = 28619147658. Its totient is φ = 28619147656.

The previous prime is 28619147587. The next prime is 28619147663. The reversal of 28619147657 is 75674191682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27522478201 + 1096669456 = 165899^2 + 33116^2 .

It is a cyclic number.

It is not a de Polignac number, because 28619147657 - 2¹⁸ = 28618885513 is a prime.

It is a super-2 number, since 2×28619147657² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28619147357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14309573828 + 14309573829.

It is an arithmetic number, because the mean of its divisors is an integer number (14309573829).

Almost surely, 2^28619147657 is an apocalyptic number.

It is an amenable number.

28619147657 is a deficient number, since it is larger than the sum of its proper divisors (1).

28619147657 is an equidigital number, since it uses as much as digits as its factorization.

28619147657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 56.

The spelling of 28619147657 in words is "twenty-eight billion, six hundred nineteen million, one hundred forty-seven thousand, six hundred fifty-seven".