28538158541 has 2 divisors, whose sum is σ = 28538158542. Its totient is φ = 28538158540.

The previous prime is 28538158507. The next prime is 28538158547. The reversal of 28538158541 is 14585183582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22799490025 + 5738668516 = 150995^2 + 75754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28538158541 is a prime.

It is a super-2 number, since 2×28538158541² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28538158541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28538158547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14269079270 + 14269079271.

It is an arithmetic number, because the mean of its divisors is an integer number (14269079271).

Almost surely, 2^28538158541 is an apocalyptic number.

It is an amenable number.

28538158541 is a deficient number, since it is larger than the sum of its proper divisors (1).

28538158541 is an equidigital number, since it uses as much as digits as its factorization.

28538158541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536000, while the sum is 50.

The spelling of 28538158541 in words is "twenty-eight billion, five hundred thirty-eight million, one hundred fifty-eight thousand, five hundred forty-one".