1028191418251 has 2 divisors, whose sum is σ = 1028191418252. Its totient is φ = 1028191418250.

The previous prime is 1028191418209. The next prime is 1028191418339. The reversal of 1028191418251 is 1528141918201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1528141918201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1028191418251 - 2²⁷ = 1028057200523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1028191418198 and 1028191418207.

It is not a weakly prime, because it can be changed into another prime (1028191418201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514095709125 + 514095709126.

It is an arithmetic number, because the mean of its divisors is an integer number (514095709126).

Almost surely, 2^{1028191418251} is an apocalyptic number.

1028191418251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028191418251 is an equidigital number, since it uses as much as digits as its factorization.

1028191418251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 43.

The spelling of 1028191418251 in words is "one trillion, twenty-eight billion, one hundred ninety-one million, four hundred eighteen thousand, two hundred fifty-one".