2540446481 has 2 divisors, whose sum is σ = 2540446482. Its totient is φ = 2540446480.

The previous prime is 2540446423. The next prime is 2540446511. The reversal of 2540446481 is 1846440452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2488014400 + 52432081 = 49880^2 + 7241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540446481 - 2¹⁸ = 2540184337 is a prime.

It is a super-2 number, since 2×2540446481² = 12907736645650566722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2540446981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270223240 + 1270223241.

It is an arithmetic number, because the mean of its divisors is an integer number (1270223241).

Almost surely, 2^2540446481 is an apocalyptic number.

It is an amenable number.

2540446481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540446481 is an equidigital number, since it uses as much as digits as its factorization.

2540446481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122880, while the sum is 38.

The square root of 2540446481 is about 50402.8419932845. The cubic root of 2540446481 is about 1364.4889303137.

The spelling of 2540446481 in words is "two billion, five hundred forty million, four hundred forty-six thousand, four hundred eighty-one".