28537733433109 has 2 divisors, whose sum is σ = 28537733433110. Its totient is φ = 28537733433108.

The previous prime is 28537733433101. The next prime is 28537733433227. The reversal of 28537733433109 is 90133433773582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22013719166884 + 6524014266225 = 4691878^2 + 2554215^2 .

It is a cyclic number.

It is not a de Polignac number, because 28537733433109 - 2³ = 28537733433101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28537733433101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14268866716554 + 14268866716555.

It is an arithmetic number, because the mean of its divisors is an integer number (14268866716555).

Almost surely, 2^{28537733433109} is an apocalyptic number.

It is an amenable number.

28537733433109 is a deficient number, since it is larger than the sum of its proper divisors (1).

28537733433109 is an equidigital number, since it uses as much as digits as its factorization.

28537733433109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34292160, while the sum is 58.

The spelling of 28537733433109 in words is "twenty-eight trillion, five hundred thirty-seven billion, seven hundred thirty-three million, four hundred thirty-three thousand, one hundred nine".