28265343137 has 2 divisors, whose sum is σ = 28265343138. Its totient is φ = 28265343136.

The previous prime is 28265343109. The next prime is 28265343143. The reversal of 28265343137 is 73134356282.

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., 14312772496 + 13952570641 = 119636^2 + 118121^2 .

It is a cyclic number.

It is not a de Polignac number, because 28265343137 - 2¹² = 28265339041 is a prime.

It is not a weakly prime, because it can be changed into another prime (28265343107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132671568 + 14132671569.

It is an arithmetic number, because the mean of its divisors is an integer number (14132671569).

Almost surely, 2^28265343137 is an apocalyptic number.

It is an amenable number.

28265343137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28265343137 is an equidigital number, since it uses as much as digits as its factorization.

28265343137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 44.

The spelling of 28265343137 in words is "twenty-eight billion, two hundred sixty-five million, three hundred forty-three thousand, one hundred thirty-seven".