1801251401263 has 2 divisors, whose sum is σ = 1801251401264. Its totient is φ = 1801251401262.

The previous prime is 1801251401237. The next prime is 1801251401269. The reversal of 1801251401263 is 3621041521081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1801251401263 is a prime.

It is a super-2 number, since 2×1801251401263² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1801251401269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900625700631 + 900625700632.

It is an arithmetic number, because the mean of its divisors is an integer number (900625700632).

Almost surely, 2^{1801251401263} is an apocalyptic number.

1801251401263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801251401263 is an equidigital number, since it uses as much as digits as its factorization.

1801251401263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 1801251401263 in words is "one trillion, eight hundred one billion, two hundred fifty-one million, four hundred one thousand, two hundred sixty-three".