28045540507 has 2 divisors, whose sum is σ = 28045540508. Its totient is φ = 28045540506.

The previous prime is 28045540489. The next prime is 28045540511. The reversal of 28045540507 is 70504554082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28045540507 - 2⁷ = 28045540379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28045540507.

It is not a weakly prime, because it can be changed into another prime (28045540207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14022770253 + 14022770254.

It is an arithmetic number, because the mean of its divisors is an integer number (14022770254).

Almost surely, 2^28045540507 is an apocalyptic number.

28045540507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28045540507 is an equidigital number, since it uses as much as digits as its factorization.

28045540507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224000, while the sum is 40.

The spelling of 28045540507 in words is "twenty-eight billion, forty-five million, five hundred forty thousand, five hundred seven".