28542197401 has 2 divisors, whose sum is σ = 28542197402. Its totient is φ = 28542197400.

The previous prime is 28542197371. The next prime is 28542197479. The reversal of 28542197401 is 10479124582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22819123600 + 5723073801 = 151060^2 + 75651^2 .

It is a cyclic number.

It is not a de Polignac number, because 28542197401 - 2¹⁹ = 28541673113 is a prime.

It is not a weakly prime, because it can be changed into another prime (28542197701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14271098700 + 14271098701.

It is an arithmetic number, because the mean of its divisors is an integer number (14271098701).

Almost surely, 2^28542197401 is an apocalyptic number.

It is an amenable number.

28542197401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28542197401 is an equidigital number, since it uses as much as digits as its factorization.

28542197401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 28542197401 in words is "twenty-eight billion, five hundred forty-two million, one hundred ninety-seven thousand, four hundred one".