28018347351641 has 2 divisors, whose sum is σ = 28018347351642. Its totient is φ = 28018347351640.

The previous prime is 28018347351583. The next prime is 28018347351707. The reversal of 28018347351641 is 14615374381082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16010881849600 + 12007465502041 = 4001360^2 + 3465179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28018347351641 is a prime.

It is not a weakly prime, because it can be changed into another prime (28018347351541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14009173675820 + 14009173675821.

It is an arithmetic number, because the mean of its divisors is an integer number (14009173675821).

Almost surely, 2^{28018347351641} is an apocalyptic number.

It is an amenable number.

28018347351641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28018347351641 is an equidigital number, since it uses as much as digits as its factorization.

28018347351641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 28018347351641 in words is "twenty-eight trillion, eighteen billion, three hundred forty-seven million, three hundred fifty-one thousand, six hundred forty-one".