28158010481 has 2 divisors, whose sum is σ = 28158010482. Its totient is φ = 28158010480.

The previous prime is 28158010457. The next prime is 28158010493. The reversal of 28158010481 is 18401085182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20001030625 + 8156979856 = 141425^2 + 90316^2 .

It is a cyclic number.

It is not a de Polignac number, because 28158010481 - 2¹⁴ = 28157994097 is a prime.

It is a super-2 number, since 2×28158010481² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28158010421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14079005240 + 14079005241.

It is an arithmetic number, because the mean of its divisors is an integer number (14079005241).

Almost surely, 2^28158010481 is an apocalyptic number.

It is an amenable number.

28158010481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28158010481 is an equidigital number, since it uses as much as digits as its factorization.

28158010481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20480, while the sum is 38.

The spelling of 28158010481 in words is "twenty-eight billion, one hundred fifty-eight million, ten thousand, four hundred eighty-one".