28640146757 has 2 divisors, whose sum is σ = 28640146758. Its totient is φ = 28640146756.

The previous prime is 28640146729. The next prime is 28640146781. The reversal of 28640146757 is 75764104682.

It is a Cunningham number, because it is equal to 169234²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28640146756 + 1 = 169234^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 28640146757 - 2¹⁰ = 28640145733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28640146727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320073378 + 14320073379.

It is an arithmetic number, because the mean of its divisors is an integer number (14320073379).

Almost surely, 2^28640146757 is an apocalyptic number.

It is an amenable number.

28640146757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28640146757 is an equidigital number, since it uses as much as digits as its factorization.

28640146757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 28640146757 in words is "twenty-eight billion, six hundred forty million, one hundred forty-six thousand, seven hundred fifty-seven".