28147129382737 has 2 divisors, whose sum is σ = 28147129382738. Its totient is φ = 28147129382736.

The previous prime is 28147129382651. The next prime is 28147129382761. The reversal of 28147129382737 is 73728392174182.

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., 27027011960001 + 1120117422736 = 5198751^2 + 1058356^2 .

It is a cyclic number.

It is not a de Polignac number, because 28147129382737 - 2²³ = 28147120994129 is a prime.

It is a super-2 number, since 2×28147129382737² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28147129382137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14073564691368 + 14073564691369.

It is an arithmetic number, because the mean of its divisors is an integer number (14073564691369).

Almost surely, 2^{28147129382737} is an apocalyptic number.

It is an amenable number.

28147129382737 is a deficient number, since it is larger than the sum of its proper divisors (1).

28147129382737 is an equidigital number, since it uses as much as digits as its factorization.

28147129382737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56899584, while the sum is 64.

The spelling of 28147129382737 in words is "twenty-eight trillion, one hundred forty-seven billion, one hundred twenty-nine million, three hundred eighty-two thousand, seven hundred thirty-seven".