1984925947801 has 2 divisors, whose sum is σ = 1984925947802. Its totient is φ = 1984925947800.

The previous prime is 1984925947789. The next prime is 1984925947883. The reversal of 1984925947801 is 1087495294891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121608083600 + 863317864201 = 1059060^2 + 929149^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984925947801 - 2³⁷ = 1847486994329 is a prime.

It is a super-3 number, since 3×1984925947801³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1984925947201) 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, 992462973900 + 992462973901.

It is an arithmetic number, because the mean of its divisors is an integer number (992462973901).

Almost surely, 2^{1984925947801} is an apocalyptic number.

It is an amenable number.

1984925947801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984925947801 is an equidigital number, since it uses as much as digits as its factorization.

1984925947801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 67.

The spelling of 1984925947801 in words is "one trillion, nine hundred eighty-four billion, nine hundred twenty-five million, nine hundred forty-seven thousand, eight hundred one".