2478900181 has 2 divisors, whose sum is σ = 2478900182. Its totient is φ = 2478900180.

The previous prime is 2478900121. The next prime is 2478900191. The reversal of 2478900181 is 1810098742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2475062500 + 3837681 = 49750^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478900181 - 2⁹ = 2478899669 is a prime.

It is a super-2 number, since 2×2478900181² = 12289892214723665522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478900121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239450090 + 1239450091.

It is an arithmetic number, because the mean of its divisors is an integer number (1239450091).

Almost surely, 2^2478900181 is an apocalyptic number.

It is an amenable number.

2478900181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478900181 is an equidigital number, since it uses as much as digits as its factorization.

2478900181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 2478900181 is about 49788.5547189311. The cubic root of 2478900181 is about 1353.3797677061.

The spelling of 2478900181 in words is "two billion, four hundred seventy-eight million, nine hundred thousand, one hundred eighty-one".