2477505559981 has 2 divisors, whose sum is σ = 2477505559982. Its totient is φ = 2477505559980.

The previous prime is 2477505559979. The next prime is 2477505560021. The reversal of 2477505559981 is 1899555057742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2340698044356 + 136807515625 = 1529934^2 + 369875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2477505559981 - 2¹ = 2477505559979 is a prime.

It is a super-2 number, since 2×2477505559981² (a number of 26 digits) contains 22 as substring.

Together with 2477505559979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2477505559901) 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, 1238752779990 + 1238752779991.

It is an arithmetic number, because the mean of its divisors is an integer number (1238752779991).

Almost surely, 2^{2477505559981} is an apocalyptic number.

It is an amenable number.

2477505559981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2477505559981 is an equidigital number, since it uses as much as digits as its factorization.

2477505559981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760000, while the sum is 67.

The spelling of 2477505559981 in words is "two trillion, four hundred seventy-seven billion, five hundred five million, five hundred fifty-nine thousand, nine hundred eighty-one".