28059551869 has 2 divisors, whose sum is σ = 28059551870. Its totient is φ = 28059551868.

The previous prime is 28059551857. The next prime is 28059551887. The reversal of 28059551869 is 96815595082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25364384644 + 2695167225 = 159262^2 + 51915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28059551869 is a prime.

It is a super-2 number, since 2×28059551869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28059551369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14029775934 + 14029775935.

It is an arithmetic number, because the mean of its divisors is an integer number (14029775935).

Almost surely, 2^28059551869 is an apocalyptic number.

It is an amenable number.

28059551869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28059551869 is an equidigital number, since it uses as much as digits as its factorization.

28059551869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 58.

The spelling of 28059551869 in words is "twenty-eight billion, fifty-nine million, five hundred fifty-one thousand, eight hundred sixty-nine".