28497371533 has 2 divisors, whose sum is σ = 28497371534. Its totient is φ = 28497371532.

The previous prime is 28497371471. The next prime is 28497371537. The reversal of 28497371533 is 33517379482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26076436324 + 2420935209 = 161482^2 + 49203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28497371533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28497371537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14248685766 + 14248685767.

It is an arithmetic number, because the mean of its divisors is an integer number (14248685767).

Almost surely, 2^28497371533 is an apocalyptic number.

It is an amenable number.

28497371533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28497371533 is an equidigital number, since it uses as much as digits as its factorization.

28497371533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 52.

The spelling of 28497371533 in words is "twenty-eight billion, four hundred ninety-seven million, three hundred seventy-one thousand, five hundred thirty-three".